char = C;code = 67
char = r;code = 114
char = (;code = 40
char = I;code = 73
char = I;code = 73
char = I;code = 73
char = );code = 41
char = /;code = 47
char = C;code = 67
char = r;code = 114
char = (;code = 40
char = V;code = 86
char = I;code = 73
char = );code = 41
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = i;code = 105
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = i;code = 105
char = u;code = 117
char = m;code = 109
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = s;code = 115
char = a;code = 97
char = m;code = 109
char = p;code = 112
char = l;code = 108
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = l;code = 108
char = u;code = 117
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = c;code = 99
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = r;code = 114
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = .;code = 46
result sql = Cr(III)/Cr(VI) speciation determination of chromium in water samples by luminescence quenching of quercetin.
Cr(III)/Cr(VI) speciation determination of chromium in water samples by luminescence quenching of quercetin.
char = A;code = 65
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = d;code = 100
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = p;code = 112
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = r;code = 114
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = i;code = 105
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = m;code = 109
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = i;code = 105
char = u;code = 117
char = m;code = 109
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = s;code = 115
char = a;code = 97
char = m;code = 109
char = p;code = 112
char = l;code = 108
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = r;code = 114
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = b;code = 98
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = x;code = 120
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = 5;code = 53
char = ;code = 32
char = m;code = 109
char = L;code = 76
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = l;code = 108
char = u;code = 117
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = r;code = 114
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = o;code = 111
char = l;code = 108
char = u;code = 117
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = s;code = 115
char = s;code = 115
char = o;code = 111
char = l;code = 108
char = v;code = 118
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = n;code = 110
char = -;code = 45
char = a;code = 97
char = m;code = 109
char = y;code = 121
char = l;code = 108
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = c;code = 99
char = o;code = 111
char = h;code = 104
char = o;code = 111
char = l;code = 108
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = 5;code = 53
char = ;code = 32
char = m;code = 109
char = L;code = 76
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = i;code = 105
char = d;code = 100
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = s;code = 115
char = o;code = 111
char = l;code = 108
char = u;code = 117
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = (;code = 40
char = p;code = 112
char = H;code = 72
char = ;code = 32
char = 1;code = 49
char = );code = 41
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = C;code = 67
char = r;code = 114
char = (;code = 40
char = V;code = 86
char = I;code = 73
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = w;code = 119
char = h;code = 104
char = i;code = 105
char = c;code = 99
char = h;code = 104
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = l;code = 108
char = i;code = 105
char = s;code = 115
char = h;code = 104
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = l;code = 108
char = u;code = 117
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = c;code = 99
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = g;code = 103
char = a;code = 97
char = n;code = 110
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = p;code = 112
char = h;code = 104
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = u;code = 117
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = p;code = 112
char = a;code = 97
char = r;code = 114
char = t;code = 116
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = r;code = 114
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = .;code = 46
char = ;code = 32
char = C;code = 67
char = r;code = 114
char = (;code = 40
char = V;code = 86
char = I;code = 73
char = );code = 41
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = u;code = 117
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = h;code = 104
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = r;code = 114
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = f;code = 102
char = l;code = 108
char = u;code = 117
char = o;code = 111
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = d;code = 100
char = ;code = 32
char = (;code = 40
char = l;code = 108
char = a;code = 97
char = m;code = 109
char = b;code = 98
char = d;code = 100
char = a;code = 97
char = (;code = 40
char = e;code = 101
char = x;code = 120
char = );code = 41
char = =;code = 61
char = 2;code = 50
char = 7;code = 55
char = 6;code = 54
char = ;code = 32
char = n;code = 110
char = m;code = 109
char = ,;code = 44
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = m;code = 109
char = b;code = 98
char = d;code = 100
char = a;code = 97
char = (;code = 40
char = e;code = 101
char = m;code = 109
char = );code = 41
char = =;code = 61
char = 3;code = 51
char = 3;code = 51
char = 1;code = 49
char = ;code = 32
char = n;code = 110
char = m;code = 109
char = );code = 41
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = f;code = 102
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = C;code = 67
char = r;code = 114
char = (;code = 40
char = I;code = 73
char = I;code = 73
char = I;code = 73
char = );code = 41
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = C;code = 67
char = r;code = 114
char = (;code = 40
char = V;code = 86
char = I;code = 73
char = );code = 41
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = t;code = 116
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = i;code = 105
char = u;code = 117
char = m;code = 109
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = C;code = 67
char = r;code = 114
char = (;code = 40
char = V;code = 86
char = I;code = 73
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = C;code = 67
char = r;code = 114
char = (;code = 40
char = I;code = 73
char = I;code = 73
char = I;code = 73
char = );code = 41
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = b;code = 98
char = t;code = 116
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = b;code = 98
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = v;code = 118
char = a;code = 97
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = b;code = 98
char = l;code = 108
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = u;code = 117
char = d;code = 100
char = i;code = 105
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = o;code = 111
char = p;code = 112
char = t;code = 116
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = z;code = 122
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = N;code = 78
char = o;code = 111
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = b;code = 98
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = b;code = 98
char = s;code = 115
char = e;code = 101
char = r;code = 114
char = v;code = 118
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = d;code = 100
char = u;code = 117
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = -;code = 45
char = e;code = 101
char = x;code = 120
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = i;code = 105
char = b;code = 98
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = g;code = 103
char = r;code = 114
char = a;code = 97
char = p;code = 112
char = h;code = 104
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = g;code = 103
char = e;code = 101
char = ;code = 32
char = 1;code = 49
char = .;code = 46
char = 0;code = 48
char = ;code = 32
char = x;code = 120
char = ;code = 32
char = 1;code = 49
char = 0;code = 48
char = (;code = 40
char = -;code = 45
char = 7;code = 55
char = );code = 41
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = 2;code = 50
char = .;code = 46
char = 0;code = 48
char = ;code = 32
char = x;code = 120
char = ;code = 32
char = 1;code = 49
char = 0;code = 48
char = (;code = 40
char = -;code = 45
char = 6;code = 54
char = );code = 41
char = M;code = 77
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = 9;code = 57
char = .;code = 46
char = 1;code = 49
char = ;code = 32
char = x;code = 120
char = ;code = 32
char = 1;code = 49
char = 0;code = 48
char = (;code = 40
char = -;code = 45
char = 9;code = 57
char = );code = 41
char = M;code = 77
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = R;code = 82
char = .;code = 46
char = S;code = 83
char = .;code = 46
char = D;code = 68
char = .;code = 46
char = ;code = 32
char = o;code = 111
char = b;code = 98
char = t;code = 116
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = 1;code = 49
char = .;code = 46
char = 0;code = 48
char = ;code = 32
char = x;code = 120
char = ;code = 32
char = 1;code = 49
char = 0;code = 48
char = (;code = 40
char = -;code = 45
char = 6;code = 54
char = );code = 41
char = M;code = 77
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = C;code = 67
char = r;code = 114
char = (;code = 40
char = V;code = 86
char = I;code = 73
char = );code = 41
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = 1;code = 49
char = .;code = 46
char = 7;code = 55
char = %;code = 37
char = ;code = 32
char = (;code = 40
char = n;code = 110
char = =;code = 61
char = 7;code = 55
char = );code = 41
char = .;code = 46
char = ;code = 32
char = V;code = 86
char = a;code = 97
char = l;code = 108
char = i;code = 105
char = d;code = 100
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = f;code = 102
char = i;code = 105
char = r;code = 114
char = m;code = 109
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = a;code = 97
char = r;code = 114
char = d;code = 100
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = d;code = 100
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = p;code = 112
char = p;code = 112
char = l;code = 108
char = i;code = 105
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = i;code = 105
char = u;code = 117
char = m;code = 109
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = i;code = 105
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = n;code = 110
char = a;code = 97
char = t;code = 116
char = u;code = 117
char = r;code = 114
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = s;code = 115
char = a;code = 97
char = m;code = 109
char = p;code = 112
char = l;code = 108
char = e;code = 101
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = c;code = 99
char = o;code = 111
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = b;code = 98
char = t;code = 116
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = i;code = 105
char = k;code = 107
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = m;code = 109
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = i;code = 105
char = u;code = 117
char = m;code = 109
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = i;code = 105
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = >;code = 62
char = 9;code = 57
char = 8;code = 56
char = %;code = 37
char = ,;code = 44
char = ;code = 32
char = w;code = 119
char = h;code = 104
char = i;code = 105
char = c;code = 99
char = h;code = 104
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = s;code = 115
char = f;code = 102
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = i;code = 105
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = a;code = 97
char = p;code = 112
char = p;code = 112
char = l;code = 108
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = d;code = 100
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
result sql = A highly sensitive and selective method has been proposed for direct speciation determination of trace amounts of chromium in water samples using quercetin. The method is based on mixing 5 mL of diluted quercetin solution dissolved in n-amyl alcohol with 5 mL of acidic solution (pH 1) of Cr(VI), which is accomplished with luminescence quenching of the organic phase due to partially oxidation of quercetin content. Cr(VI) is determined by measuring the diminished content of quercetin with spectrofluorometric method (lambda(ex)=276 nm, lambda(em)=331 nm). After oxidation of the Cr(III) content to Cr(VI) and determination of the total chromium as Cr(VI), the Cr(III) is obtained by subtracting. All the variables were studied in order to optimize the reaction conditions. No considerable interference was observed due to the presence of co-existing anions and cations. The calibration graphs were linear in the range 1.0 x 10(-7) to 2.0 x 10(-6)M with the detection limits of 9.1 x 10(-9)M. The R.S.D. obtained for 1.0 x 10(-6)M of Cr(VI) was 1.7% (n=7). Validation of the measurements was confirmed using standard reference materials. The method was applied to determine the chromium species in natural water samples. The recoveries obtained for the spiked amount of chromium species were >98%, which denote on satisfactorily application of the method.

Publication: J. Hazard. Mater. 2009 Jun 15 ;165(1-3)::1062-7. :doi: 10.1016/j.jhazmat.2008.10.084.
Publication Date: 2009 Jun 15
Study Author(s): Hosseini, Mohammad Saeid;Belador, Foroogh;
Institution: Department of Chemistry, Faculty of Science, Birjand University, Birjand, Iran. [email protected]
Shortcut link to this study:
A highly sensitive and selective method has been proposed for direct speciation determination of trace amounts of chromium in water samples using quercetin. The method is based on mixing 5 mL of diluted quercetin solution dissolved in n-amyl alcohol with 5 mL of acidic solution (pH 1) of Cr(VI), which is accomplished with luminescence quenching of the organic phase due to partially oxidation of quercetin content. Cr(VI) is determined by measuring the diminished content of quercetin with spectrofluorometric method (lambda(ex)=276 nm, lambda(em)=331 nm). After oxidation of the Cr(III) content to Cr(VI) and determination of the total chromium as Cr(VI), the Cr(III) is obtained by subtracting. All the variables were studied in order to optimize the reaction conditions. No considerable interference was observed due to the presence of co-existing anions and cations. The calibration graphs were linear in the range 1.0 x 10(-7) to 2.0 x 10(-6)M with the detection limits of 9.1 x 10(-9)M. The R.S.D. obtained for 1.0 x 10(-6)M of Cr(VI) was 1.7% (n=7). Validation of the measurements was confirmed using standard reference materials. The method was applied to determine the chromium species in natural water samples. The recoveries obtained for the spiked amount of chromium species were >98%, which denote on satisfactorily application of the method.
PMID: 19135303

Have comments? Post them here:

comments powered by Disqus

Get breaking news about nutritional cures, dangerous chemicals, superfoods . and more.

Subscribe to the FREE Natural News email newsletter. Your privacy is protected.