|
|
char = P;code = 80
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = r;code = 114
char = v;code = 118
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 = a;code = 97
char = r;code = 114
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = i;code = 105
char = c;code = 99
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 = 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 = p;code = 112
char = h;code = 104
char = o;code = 111
char = s;code = 115
char = p;code = 112
char = h;code = 104
char = o;code = 111
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 = 45
char = -;code = 45
char = l;code = 108
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = t;code = 116
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 = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = n;code = 110
char = g;code = 103
char = -;code = 45
char = t;code = 116
char = e;code = 101
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 = i;code = 105
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = .;code = 46
result sql = Preservation of arsenic species in water samples using phosphoric acid--limitations and long-term stability.
Preservation of arsenic species in water samples using phosphoric acid--limitations and long-term stability.char = T;code = 84
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 = r;code = 114
char = v;code = 118
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 = a;code = 97
char = r;code = 114
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = i;code = 105
char = c;code = 99
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 = 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 = i;code = 105
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = s;code = 115
char = p;code = 112
char = e;code = 101
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char = s;code = 115
char = a;code = 97
char = b;code = 98
char = l;code = 108
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 = t;code = 116
char = o;code = 111
char = ;code = 32
char = a;code = 97
char = v;code = 118
char = o;code = 111
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char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = i;code = 105
char = r;code = 114
char = ;code = 32
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char = h;code = 104
char = a;code = 97
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char = g;code = 103
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = d;code = 100
char = u;code = 117
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = a;code = 97
char = g;code = 103
char = e;code = 101
char = ,;code = 44
char = ;code = 32
char = i;code = 105
char = f;code = 102
char = ;code = 32
char = i;code = 105
char = t;code = 116
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = t;code = 116
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = b;code = 98
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
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 = e;code = 101
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = m;code = 109
char = ;code = 32
char = i;code = 105
char = m;code = 109
char = m;code = 109
char = e;code = 101
char = d;code = 100
char = i;code = 105
char = a;code = 97
char = t;code = 116
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 = a;code = 97
char = i;code = 105
char = m;code = 109
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = v;code = 118
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = g;code = 103
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = m;code = 109
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = t;code = 116
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 = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = s;code = 115
char = u;code = 117
char = g;code = 103
char = g;code = 103
char = e;code = 101
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char = e;code = 101
char = d;code = 100
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char = m;code = 109
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char = t;code = 116
char = h;code = 104
char = o;code = 111
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = y;code = 121
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 = p;code = 112
char = h;code = 104
char = o;code = 111
char = s;code = 115
char = p;code = 112
char = h;code = 104
char = o;code = 111
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
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char = a;code = 97
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = r;code = 114
char = v;code = 118
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
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 = r;code = 114
char = e;code = 101
char = m;code = 109
char = a;code = 97
char = i;code = 105
char = n;code = 110
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 = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = 3;code = 51
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = y;code = 121
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = w;code = 119
char = ;code = 32
char = e;code = 101
char = v;code = 118
char = i;code = 105
char = d;code = 100
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 = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
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 = o;code = 111
char = f;code = 102
char = ;code = 32
char = i;code = 105
char = r;code = 114
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = n;code = 110
char = g;code = 103
char = a;code = 97
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = C;code = 67
char = r;code = 114
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
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char = i;code = 105
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
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char = i;code = 105
char = n;code = 110
char = c;code = 99
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = p;code = 112
char = H;code = 72
char = >;code = 62
char = 3;code = 51
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = o;code = 111
char = r;code = 114
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = y;code = 121
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = c;code = 99
char = i;code = 105
char = p;code = 112
char = i;code = 105
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = r;code = 114
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char = g;code = 103
char = i;code = 105
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = F;code = 70
char = e;code = 101
char = (;code = 40
char = 3;code = 51
char = );code = 41
char = (;code = 40
char = P;code = 80
char = O;code = 79
char = (;code = 40
char = 4;code = 52
char = );code = 41
char = );code = 41
char = (;code = 40
char = 2;code = 50
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char = );code = 41
char = ;code = 32
char = c;code = 99
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char = l;code = 108
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char = o;code = 111
char = c;code = 99
char = c;code = 99
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char = r;code = 114
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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 = s;code = 115
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = l;code = 108
char = d;code = 100
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char = b;code = 98
char = e;code = 101
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char = a;code = 97
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char = e;code = 101
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char = .;code = 46
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char = P;code = 80
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char = s;code = 115
char = p;code = 112
char = h;code = 104
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char = i;code = 105
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char = a;code = 97
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char = t;code = 116
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char = a;code = 97
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char = f;code = 102
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char = c;code = 99
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char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = o;code = 111
char = f;code = 102
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char = 1;code = 49
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char = M;code = 77
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char = a;code = 97
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char = b;code = 98
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char = h;code = 104
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char = k;code = 107
char = e;code = 101
char = e;code = 101
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char = g;code = 103
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char = e;code = 101
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char = a;code = 97
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char = p;code = 112
char = l;code = 108
char = e;code = 101
char = s;code = 115
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char = c;code = 99
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char = l;code = 108
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char = g;code = 103
char = r;code = 114
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char = e;code = 101
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char = C;code = 67
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char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = d;code = 100
char = a;code = 97
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char = F;code = 70
char = i;code = 105
char = l;code = 108
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 = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = s;code = 115
char = a;code = 97
char = m;code = 109
char = p;code = 112
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char = e;code = 101
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char = b;code = 98
char = e;code = 101
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char = r;code = 114
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char = t;code = 116
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char = e;code = 101
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char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = t;code = 116
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char = o;code = 111
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char = l;code = 108
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char = f;code = 102
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char = c;code = 99
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char = o;code = 111
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char = (;code = 40
char = w;code = 119
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char = t;code = 116
char = h;code = 104
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char = u;code = 117
char = t;code = 116
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char = l;code = 108
char = o;code = 111
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char = );code = 41
char = .;code = 46
char = ;code = 32
char = I;code = 73
char = t;code = 116
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char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = w;code = 119
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char = t;code = 116
char = h;code = 104
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char = t;code = 116
char = e;code = 101
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char = e;code = 101
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char = m;code = 109
char = p;code = 112
char = l;code = 108
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char = s;code = 115
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = ;code = 32
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char = r;code = 114
char = e;code = 101
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char = e;code = 101
char = r;code = 114
char = v;code = 118
char = e;code = 101
char = d;code = 100
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char = y;code = 121
char = ;code = 32
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char = t;code = 116
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char = i;code = 105
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
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char = t;code = 116
char = h;code = 104
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 = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = c;code = 99
char = h;code = 104
char = e;code = 101
char = m;code = 109
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char = .;code = 46
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char = /;code = 47
char = >;code = 62
result sql = The preservation of arsenic species in water samples is an indispensable method to avoid their changes during storage, if it is not possible to analyse them immediately. The aim of this investigation was to demonstrate the limitations of the suggested method by using phosphoric acid as a preservation agent. The samples remain stable for 3 months, even if they show evidence of high concentrations of iron or manganese. Critical is an increasing pH>3. Theoretically, a precipitation of strengite (Fe(3)(PO(4))(2)) could occur, which should be avoided. Phosphoric acid with a final concentration of 10mM is recommended as a preservation agent, combined with keeping the samples cool (6 degrees C) and dark. Filtration of samples before preservation may be carried out with respect to the analytical aim to distinguish between the total and soluble fraction (without colloids). It was shown that filtered and non-filtered samples can be preserved by utilising the above mentioned scheme.
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char = e;code = 101
char = r;code = 114
char = v;code = 118
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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 = a;code = 97
char = r;code = 114
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = i;code = 105
char = c;code = 99
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 = 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 = p;code = 112
char = h;code = 104
char = o;code = 111
char = s;code = 115
char = p;code = 112
char = h;code = 104
char = o;code = 111
char = r;code = 114
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char = c;code = 99
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char = c;code = 99
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char = -;code = 45
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char = m;code = 109
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char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = n;code = 110
char = g;code = 103
char = -;code = 45
char = t;code = 116
char = e;code = 101
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 = i;code = 105
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = .;code = 46
result sql = Preservation of arsenic species in water samples using phosphoric acid--limitations and long-term stability.
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char = ;code = 32
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char = r;code = 114
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char = r;code = 114
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char = t;code = 116
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char = o;code = 111
char = f;code = 102
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result sql = The preservation of arsenic species in water samples is an indispensable method to avoid their changes during storage, if it is not possible to analyse them immediately. The aim of this investigation was to demonstrate the limitations of the suggested method by using phosphoric acid as a preservation agent. The samples remain stable for 3 months, even if they show evidence of high concentrations of iron or manganese. Critical is an increasing pH>3. Theoretically, a precipitation of strengite (Fe(3)(PO(4))(2)) could occur, which should be avoided. Phosphoric acid with a final concentration of 10mM is recommended as a preservation agent, combined with keeping the samples cool (6 degrees C) and dark. Filtration of samples before preservation may be carried out with respect to the analytical aim to distinguish between the total and soluble fraction (without colloids). It was shown that filtered and non-filtered samples can be preserved by utilising the above mentioned scheme.
Publication: Talanta 2006 Apr 15 ;69(2)::430-4. :doi: 10.1016/j.talanta.2005.10.012.
Publication Date: 2006 Apr 15
Study Author(s): Daus, B;Weiss, H;Mattusch, J;Wennrich, R;
Institution: UFZ Centre for Environmental Research, Permoserstrasse 15, Leipzig, Germany. [email protected]
Shortcut link to this study:
Publication Date: 2006 Apr 15
Study Author(s): Daus, B;Weiss, H;Mattusch, J;Wennrich, R;
Institution: UFZ Centre for Environmental Research, Permoserstrasse 15, Leipzig, Germany. [email protected]
Shortcut link to this study:
The preservation of arsenic species in water samples is an indispensable method to avoid their changes during storage, if it is not possible to analyse them immediately. The aim of this investigation was to demonstrate the limitations of the suggested method by using phosphoric acid as a preservation agent. The samples remain stable for 3 months, even if they show evidence of high concentrations of iron or manganese. Critical is an increasing pH>3. Theoretically, a precipitation of strengite (Fe(3)(PO(4))(2)) could occur, which should be avoided. Phosphoric acid with a final concentration of 10mM is recommended as a preservation agent, combined with keeping the samples cool (6 degrees C) and dark. Filtration of samples before preservation may be carried out with respect to the analytical aim to distinguish between the total and soluble fraction (without colloids). It was shown that filtered and non-filtered samples can be preserved by utilising the above mentioned scheme.
PMID: 18970585
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