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result sql = Optimisation of a headspace-solid-phase micro-extraction method for simultaneous determination of organometallic compounds of mercury, lead and tin in water by gas chromatography-tandem mass spectrometry.

Optimisation of a headspace-solid-phase micro-extraction method for simultaneous determination of organometallic compounds of mercury, lead and tin in water by gas chromatography-tandem mass spectrometry.

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char = E;code = 69
char = ;code = 32
char = T;code = 84
char = H;code = 72
char = E;code = 69
char = ;code = 32
char = F;code = 70
char = O;code = 79
char = L;code = 76
char = L;code = 76
char = O;code = 79
char = W;code = 87
char = I;code = 73
char = N;code = 78
char = G;code = 71
char = :;code = 58
char = ;code = 32
char = <;code = 60
char = /;code = 47
char = b;code = 98
char = >;code = 62
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = 5;code = 53
char = 0;code = 48
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = /;code = 47
char = 3;code = 51
char = 0;code = 48
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = v;code = 118
char = i;code = 105
char = n;code = 110
char = y;code = 121
char = l;code = 108
char = -;code = 45
char = b;code = 98
char = e;code = 101
char = n;code = 110
char = z;code = 122
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = /;code = 47
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = o;code = 111
char = x;code = 120
char = e;code = 101
char = n;code = 110
char = /;code = 47
char = p;code = 112
char = o;code = 111
char = l;code = 108
char = y;code = 121
char = d;code = 100
char = i;code = 105
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 = s;code = 115
char = i;code = 105
char = l;code = 108
char = o;code = 111
char = x;code = 120
char = a;code = 97
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = D;code = 68
char = V;code = 86
char = B;code = 66
char = /;code = 47
char = C;code = 67
char = A;code = 65
char = R;code = 82
char = /;code = 47
char = P;code = 80
char = D;code = 68
char = M;code = 77
char = S;code = 83
char = );code = 41
char = ;code = 32
char = S;code = 83
char = P;code = 80
char = M;code = 77
char = E;code = 69
char = ;code = 32
char = f;code = 102
char = i;code = 105
char = b;code = 98
char = r;code = 114
char = e;code = 101
char = ,;code = 44
char = ;code = 32
char = 1;code = 49
char = 5;code = 53
char = 0;code = 48
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = v;code = 118
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = s;code = 115
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = i;code = 105
char = m;code = 109
char = e;code = 101
char = ,;code = 44
char = ;code = 32
char = 1;code = 49
char = 5;code = 53
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = e;code = 101
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 = t;code = 116
char = i;code = 105
char = m;code = 109
char = e;code = 101
char = ,;code = 44
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 = ;code = 32
char = a;code = 97
char = g;code = 103
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 = ;code = 32
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = 2;code = 50
char = 5;code = 53
char = 0;code = 48
char = ;code = 32
char = r;code = 114
char = p;code = 112
char = m;code = 109
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 4;code = 52
char = 0;code = 48
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = g;code = 103
char = r;code = 114
char = e;code = 101
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = C;code = 67
char = ;code = 32
char = e;code = 101
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 = t;code = 116
char = e;code = 101
char = m;code = 109
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = u;code = 117
char = r;code = 114
char = e;code = 101
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 = 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 = c;code = 99
char = h;code = 104
char = a;code = 97
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = c;code = 99
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
char = ;code = 32
char = H;code = 72
char = S;code = 83
char = -;code = 45
char = S;code = 83
char = P;code = 80
char = M;code = 77
char = E;code = 69
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 = c;code = 99
char = o;code = 111
char = m;code = 109
char = b;code = 98
char = i;code = 105
char = n;code = 110
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 = G;code = 71
char = C;code = 67
char = -;code = 45
char = M;code = 77
char = S;code = 83
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = G;code = 71
char = C;code = 67
char = -;code = 45
char = M;code = 77
char = S;code = 83
char = /;code = 47
char = M;code = 77
char = S;code = 83
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = e;code = 101
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = u;code = 117
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
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 = o;code = 111
char = m;code = 109
char = b;code = 98
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 = b;code = 98
char = o;code = 111
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = t;code = 116
char = e;code = 101
char = c;code = 99
char = h;code = 104
char = n;code = 110
char = i;code = 105
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = H;code = 72
char = S;code = 83
char = -;code = 45
char = S;code = 83
char = P;code = 80
char = M;code = 77
char = E;code = 69
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = G;code = 71
char = C;code = 67
char = -;code = 45
char = M;code = 77
char = S;code = 83
char = /;code = 47
char = M;code = 77
char = S;code = 83
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = a;code = 97
char = t;code = 116
char = t;code = 116
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = r;code = 114
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 = 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 = (;code = 40
char = 4;code = 52
char = -;code = 45
char = 3;code = 51
char = 3;code = 51
char = ;code = 32
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = l;code = 108
char = (;code = 40
char = -;code = 45
char = 1;code = 49
char = );code = 41
char = );code = 41
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = s;code = 115
char = e;code = 101
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 = H;code = 72
char = S;code = 83
char = -;code = 45
char = S;code = 83
char = P;code = 80
char = M;code = 77
char = E;code = 69
char = -;code = 45
char = G;code = 71
char = C;code = 67
char = -;code = 45
char = M;code = 77
char = S;code = 83
char = ;code = 32
char = (;code = 40
char = 1;code = 49
char = 7;code = 55
char = -;code = 45
char = 4;code = 52
char = 5;code = 53
char = ;code = 32
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = l;code = 108
char = (;code = 40
char = -;code = 45
char = 1;code = 49
char = );code = 41
char = );code = 41
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
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 = 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 = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = g;code = 103
char = o;code = 111
char = o;code = 111
char = d;code = 100
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 = r;code = 114
char = e;code = 101
char = g;code = 103
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = c;code = 99
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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 = r;code = 114
char = (;code = 40
char = 2;code = 50
char = );code = 41
char = >;code = 62
char = 0;code = 48
char = .;code = 46
char = 9;code = 57
char = 9;code = 57
char = 7;code = 55
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 = r;code = 114
char = e;code = 101
char = p;code = 112
char = e;code = 101
char = a;code = 97
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 = 32
char = (;code = 40
char = 4;code = 52
char = .;code = 46
char = 8;code = 56
char = -;code = 45
char = 2;code = 50
char = 1;code = 49
char = .;code = 46
char = 0;code = 48
char = %;code = 37
char = );code = 41
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = d;code = 100
char = s;code = 115
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char = u;code = 117
char = n;code = 110
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = u;code = 117
char = d;code = 100
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 = c;code = 99
char = c;code = 99
char = u;code = 117
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = y;code = 121
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 = m;code = 109
char = e;code = 101
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char = h;code = 104
char = o;code = 111
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char = ;code = 32
char = m;code = 109
char = e;code = 101
char = a;code = 97
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char = u;code = 117
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char = ;code = 32
char = a;code = 97
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char = a;code = 97
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = g;code = 103
char = e;code = 101
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char = p;code = 112
char = e;code = 101
char = r;code = 114
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char = e;code = 101
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = g;code = 103
char = e;code = 101
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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 = y;code = 121
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 = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = d;code = 100
char = s;code = 115
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char = i;code = 105
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char = s;code = 115
char = p;code = 112
char = i;code = 105
char = k;code = 107
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char = i;code = 105
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char = e;code = 101
char = r;code = 114
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char = w;code = 119
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = r;code = 114
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char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = a;code = 97
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char = a;code = 97
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char = e;code = 101
char = r;code = 114
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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
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char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = e;code = 101
char = r;code = 114
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char = t;code = 116
char = h;code = 104
char = a;code = 97
char = n;code = 110
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char = 8;code = 56
char = 0;code = 48
char = %;code = 37
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
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char = a;code = 97
char = l;code = 108
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char = ;code = 32
char = t;code = 116
char = h;code = 104
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char = c;code = 99
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char = p;code = 112
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char = u;code = 117
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char = d;code = 100
char = s;code = 115
char = ;code = 32
char = s;code = 115
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char = i;code = 105
char = e;code = 101
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char = ,;code = 44
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char = t;code = 116
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
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char = m;code = 109
char = o;code = 111
char = n;code = 110
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char = b;code = 98
char = u;code = 117
char = t;code = 116
char = y;code = 121
char = l;code = 108
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char = i;code = 105
char = n;code = 110
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char = i;code = 105
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char = h;code = 104
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char = r;code = 114
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char = v;code = 118
char = e;code = 101
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char = w;code = 119
char = a;code = 97
char = t;code = 116
char = e;code = 101
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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 = .;code = 46
char = ;code = 32
char = A;code = 65
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = u;code = 117
char = d;code = 100
char = y;code = 121
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 = u;code = 117
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = r;code = 114
char = t;code = 116
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = o;code = 111
char = c;code = 99
char = i;code = 105
char = a;code = 97
char = t;code = 116
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 = 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 = t;code = 116
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
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 = s;code = 115
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = s;code = 115
char = o;code = 111
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = r;code = 114
char = i;code = 105
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = u;code = 117
char = t;code = 116
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
result sql = In this work, a headspace-solid-phase micro-extraction (HS-SPME) combined with gas chromatography-mass spectrometry (GC-MS) method for multielemental speciation of organometallic compounds of mercury, lead and tin in water samples was upgraded by the introduction of tandem mass spectrometry (MS/MS) as detection technique. The analytical method is based on the ethylation with NaBEt(4) and simultaneous headspace-solid-phase micro-extraction of the derivative compounds followed by GC-MS/MS analysis. The main experimental parameters influencing the extraction efficiency such as derivatisation time, extraction time and extraction temperature were optimized. THE OVERALL OPTIMUM EXTRACTION CONDITIONS WERE THE FOLLOWING: a 50 microm/30 microm divinyl-benzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS) SPME fibre, 150 min derivatisation time, 15 min extraction time, sample agitation at 250 rpm and 40 degrees C extraction temperature. The analytical characteristics of the HS-SPME method combined with GC-MS and GC-MS/MS were evaluated. The combination of both techniques HS-SPME and GC-MS/MS allowed to attain lower limits of detection (4-33 ng l(-1)) than those obtained by HS-SPME-GC-MS (17-45 ng l(-1)). The proposed method presented good linear regression coefficients (r(2)>0.9970) and repeatability (4.8-21.0%) for all the compounds under study. The accuracy of the method measured as the average percentage recovery of the compounds in spiked river water and seawater samples was higher than 80% for all the compounds studied, except for monobutyltin in the river water sample. A study of the uncertainty associated with the analytical results was also carried out.

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