char = E;code = 69
char = x;code = 120
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 = o;code = 111
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = -;code = 45
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = m;code = 109
char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = q;code = 113
char = u;code = 117
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = a;code = 97
char = t;code = 116
char = o;code = 111
char = g;code = 103
char = r;code = 114
char = a;code = 97
char = p;code = 112
char = h;code = 104
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = y;code = 121
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = C;code = 67
char = 6;code = 54
char = 0;code = 48
char = ,;code = 44
char = ;code = 32
char = C;code = 67
char = 7;code = 55
char = 0;code = 48
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = [;code = 91
char = 6;code = 54
char = ,;code = 44
char = 6;code = 54
char = ];code = 93
char = -;code = 45
char = p;code = 112
char = h;code = 104
char = e;code = 101
char = n;code = 110
char = y;code = 121
char = l;code = 108
char = ;code = 32
char = C;code = 67
char = 6;code = 54
char = 1;code = 49
char = -;code = 45
char = b;code = 98
char = u;code = 117
char = t;code = 116
char = y;code = 121
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
char = l;code = 108
char = ;code = 32
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = y;code = 121
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
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 = s;code = 115
char = .;code = 46
result sql = Extraction and high-performance liquid chromatographic analysis of C60, C70, and [6,6]-phenyl C61-butyric acid methyl ester in synthetic and natural waters.
Extraction and high-performance liquid chromatographic analysis of C60, C70, and [6,6]-phenyl C61-butyric acid methyl ester in synthetic and natural waters.
char = S;code = 83
char = t;code = 116
char = u;code = 117
char = d;code = 100
char = i;code = 105
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = w;code = 119
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 6;code = 54
char = 0;code = 48
char = );code = 41
char = ;code = 32
char = f;code = 102
char = u;code = 117
char = l;code = 108
char = l;code = 108
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = m;code = 109
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = b;code = 98
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = l;code = 108
char = l;code = 108
char = o;code = 111
char = i;code = 105
char = d;code = 100
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
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 = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = u;code = 117
char = l;code = 108
char = t;code = 116
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 6;code = 54
char = 0;code = 48
char = );code = 41
char = ;code = 32
char = a;code = 97
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = n;code = 110
char = t;code = 116
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 = s;code = 115
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = n;code = 110
char = y;code = 121
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = g;code = 103
char = n;code = 110
char = i;code = 105
char = t;code = 116
char = u;code = 117
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = b;code = 98
char = o;code = 111
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 6;code = 54
char = 0;code = 48
char = );code = 41
char = ';code = 39
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = o;code = 111
char = l;code = 108
char = u;code = 117
char = b;code = 98
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;;code = 59
char = ;code = 32
char = h;code = 104
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = ,;code = 44
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = t;code = 116
char = a;code = 97
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 = s;code = 115
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 = a;code = 97
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = y;code = 121
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 6;code = 54
char = 0;code = 48
char = );code = 41
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = f;code = 102
char = u;code = 117
char = l;code = 108
char = l;code = 108
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = e;code = 101
char = n;code = 110
char = v;code = 118
char = i;code = 105
char = r;code = 114
char = o;code = 111
char = n;code = 110
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = d;code = 100
char = i;code = 105
char = a;code = 97
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = c;code = 99
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = U;code = 85
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = 8;code = 56
char = 0;code = 48
char = /;code = 47
char = 2;code = 50
char = 0;code = 48
char = v;code = 118
char = /;code = 47
char = v;code = 118
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = l;code = 108
char = u;code = 117
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = -;code = 45
char = a;code = 97
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = o;code = 111
char = n;code = 110
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = i;code = 105
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = b;code = 98
char = i;code = 105
char = l;code = 108
char = e;code = 101
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 = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = 4;code = 52
char = .;code = 46
char = 6;code = 54
char = ;code = 32
char = m;code = 109
char = m;code = 109
char = ;code = 32
char = x;code = 120
char = ;code = 32
char = 1;code = 49
char = 5;code = 53
char = 0;code = 48
char = ;code = 32
char = m;code = 109
char = m;code = 109
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = s;code = 115
char = m;code = 109
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = l;code = 108
char = ;code = 32
char = 5;code = 53
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = P;code = 80
char = Y;code = 89
char = E;code = 69
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = l;code = 108
char = u;code = 117
char = m;code = 109
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 6;code = 54
char = 0;code = 48
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 7;code = 55
char = 0;code = 48
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = P;code = 80
char = C;code = 67
char = B;code = 66
char = M;code = 77
char = ;code = 32
char = (;code = 40
char = [;code = 91
char = 6;code = 54
char = ,;code = 44
char = 6;code = 54
char = ];code = 93
char = -;code = 45
char = p;code = 112
char = h;code = 104
char = e;code = 101
char = n;code = 110
char = y;code = 121
char = l;code = 108
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 6;code = 54
char = 1;code = 49
char = );code = 41
char = -;code = 45
char = b;code = 98
char = u;code = 117
char = t;code = 116
char = y;code = 121
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
char = l;code = 108
char = ;code = 32
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = );code = 41
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = f;code = 102
char = u;code = 117
char = l;code = 108
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = r;code = 114
char = e;code = 101
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 = 46
char = ;code = 32
char = S;code = 83
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 = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
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 = s;code = 115
char = ;code = 32
char = (;code = 40
char = a;code = 97
char = l;code = 108
char = p;code = 112
char = h;code = 104
char = a;code = 97
char = );code = 41
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 6;code = 54
char = 0;code = 48
char = );code = 41
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = P;code = 80
char = C;code = 67
char = B;code = 66
char = M;code = 77
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 7;code = 55
char = 0;code = 48
char = );code = 41
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 6;code = 54
char = 0;code = 48
char = );code = 41
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = 3;code = 51
char = .;code = 46
char = 1;code = 49
char = 8;code = 56
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 2;code = 50
char = .;code = 46
char = 1;code = 49
char = 9;code = 57
char = ,;code = 44
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = p;code = 112
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 = l;code = 108
char = y;code = 121
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = y;code = 121
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = v;code = 118
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = g;code = 103
char = t;code = 116
char = h;code = 104
char = s;code = 115
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 = f;code = 102
char = u;code = 117
char = l;code = 108
char = l;code = 108
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = n;code = 110
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 = 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 = t;code = 116
char = o;code = 111
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = ;code = 32
char = 3;code = 51
char = 3;code = 51
char = 0;code = 48
char = ,;code = 44
char = ;code = 32
char = 3;code = 51
char = 3;code = 51
char = 3;code = 51
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 3;code = 51
char = 3;code = 51
char = 3;code = 51
char = ;code = 32
char = n;code = 110
char = m;code = 109
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 = o;code = 111
char = g;code = 103
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = a;code = 97
char = b;code = 98
char = s;code = 115
char = o;code = 111
char = r;code = 114
char = p;code = 112
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 = e;code = 101
char = f;code = 102
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = i;code = 105
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = l;code = 108
char = o;code = 111
char = g;code = 103
char = ;code = 32
char = e;code = 101
char = p;code = 112
char = s;code = 115
char = i;code = 105
char = l;code = 108
char = o;code = 111
char = n;code = 110
char = );code = 41
char = ;code = 32
char = o;code = 111
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char = t;code = 116
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char = o;code = 111
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char = o;code = 111
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char = ;code = 32
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char = l;code = 108
char = ;code = 32
char = t;code = 116
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char = e;code = 101
char = e;code = 101
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char = u;code = 117
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char = i;code = 105
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char = ;code = 32
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char = u;code = 117
char = e;code = 101
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char = u;code = 117
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = s;code = 115
char = p;code = 112
char = e;code = 101
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char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = o;code = 111
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char = e;code = 101
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char = ;code = 32
char = a;code = 97
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
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char = f;code = 102
char = ;code = 32
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char = H;code = 72
char = ;code = 32
char = (;code = 40
char = 4;code = 52
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char = );code = 41
char = ;code = 32
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char = d;code = 100
char = ;code = 32
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char = i;code = 105
char = c;code = 99
char = ;code = 32
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char = t;code = 116
char = r;code = 114
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char = g;code = 103
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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
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char = e;code = 101
char = r;code = 114
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char = ;code = 32
char = g;code = 103
char = o;code = 111
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char = d;code = 100
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char = ;code = 32
char = W;code = 87
char = h;code = 104
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char = l;code = 108
char = e;code = 101
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char = e;code = 101
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char = h;code = 104
char = o;code = 111
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char = ;code = 32
char = q;code = 113
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char = n;code = 110
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char = i;code = 105
char = f;code = 102
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 = l;code = 108
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = t;code = 116
char = s;code = 115
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char = f;code = 102
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char = ;code = 32
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char = r;code = 114
char = o;code = 111
char = u;code = 117
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char = d;code = 100
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = u;code = 117
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char = a;code = 97
char = c;code = 99
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char = ;code = 32
char = s;code = 115
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char = s;code = 115
char = p;code = 112
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char = n;code = 110
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
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
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char = 7;code = 55
char = ,;code = 44
char = ;code = 32
char = 2;code = 50
char = .;code = 46
char = 4;code = 52
char = 8;code = 56
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 6;code = 54
char = .;code = 46
char = 5;code = 53
char = 4;code = 52
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
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char = g;code = 103
char = /;code = 47
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char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = P;code = 80
char = C;code = 67
char = B;code = 66
char = M;code = 77
char = ,;code = 44
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 6;code = 54
char = 0;code = 48
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = C;code = 67
char = (;code = 40
char = 7;code = 55
char = 0;code = 48
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = p;code = 112
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 = l;code = 108
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result sql = Studies have shown that C(60) fullerene can form stable colloidal suspensions in water that result in C(60) aqueous concentrations many orders of magnitude above C(60)'s aqueous solubility; however, quantitative methods for the analysis of C(60) and other fullerenes in environmental media are scarce. Using a 80/20v/v toluene-acetonitrile mobile phase and a 4.6 mm x 150 mm Cosmosil 5micron PYE column, C(60), C(70), and PCBM ([6,6]-phenyl C(61)-butyric acid methyl ester) were fully resolved. Selectivity factors (alpha) for C(60) relative to PCBM and C(70) relative to C(60) were 3.18 and 2.19, respectively. The best analytical wavelengths for the fullerenes were determined to be 330, 333, and 333 nm with log molar absorption coefficients (log epsilon) of 4.63, 4.82, and 4.60 for PCBM, C(60), C(70), respectively. Extraction and quantitation of all three fullerenes in aqueous suspensions over a range of pH (4-10) and ionic strengths were very good. Whole-method quantification limits for ground and surface suspensions were 2.87, 2.48, and 6.54 microg/L for PCBM, C(60), and C(70), respectively.

Publication: J Chromatogr A 2008 Sep 5 ;1203(2)::153-9. :doi: 10.1016/j.chroma.2008.07.068.
Publication Date: 2008 Sep 5
Study Author(s): Bouchard, Dermont;Ma, Xin;
Institution: US Environmental Protection Agency, National Exposure Research Laboratory, Athens, GA 30605, USA. [email protected]
Shortcut link to this study:
Studies have shown that C(60) fullerene can form stable colloidal suspensions in water that result in C(60) aqueous concentrations many orders of magnitude above C(60)'s aqueous solubility; however, quantitative methods for the analysis of C(60) and other fullerenes in environmental media are scarce. Using a 80/20v/v toluene-acetonitrile mobile phase and a 4.6 mm x 150 mm Cosmosil 5micron PYE column, C(60), C(70), and PCBM ([6,6]-phenyl C(61)-butyric acid methyl ester) were fully resolved. Selectivity factors (alpha) for C(60) relative to PCBM and C(70) relative to C(60) were 3.18 and 2.19, respectively. The best analytical wavelengths for the fullerenes were determined to be 330, 333, and 333 nm with log molar absorption coefficients (log epsilon) of 4.63, 4.82, and 4.60 for PCBM, C(60), C(70), respectively. Extraction and quantitation of all three fullerenes in aqueous suspensions over a range of pH (4-10) and ionic strengths were very good. Whole-method quantification limits for ground and surface suspensions were 2.87, 2.48, and 6.54 microg/L for PCBM, C(60), and C(70), respectively.
PMID: 18687437

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