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result sql = Development of a compound-specific carbon isotope analysis method for atmospheric formaldehyde via NaHSO3 and cysteamine derivatization.

Development of a compound-specific carbon isotope analysis method for atmospheric formaldehyde via NaHSO3 and cysteamine derivatization.

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char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = e;code = 101
char = e;code = 101
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = m;code = 109
char = a;code = 97
char = l;code = 108
char = d;code = 100
char = e;code = 101
char = h;code = 104
char = y;code = 121
char = d;code = 100
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = l;code = 108
char = t;code = 116
char = a;code = 97
char = 1;code = 49
char = 3;code = 51
char = C;code = 67
char = ;code = 32
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = u;code = 117
char = e;code = 101
char = s;code = 115
char = ,;code = 44
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 = e;code = 101
char = x;code = 120
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = i;code = 105
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 = e;code = 101
char = r;code = 114
char = e;code = 101
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 = 32
char = o;code = 111
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = g;code = 103
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 = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = m;code = 109
char = a;code = 97
char = l;code = 108
char = d;code = 100
char = e;code = 101
char = h;code = 104
char = y;code = 121
char = d;code = 100
char = e;code = 101
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 = 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 = r;code = 114
char = b;code = 98
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = o;code = 111
char = t;code = 116
char = o;code = 111
char = p;code = 112
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 = 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 = a;code = 97
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = i;code = 105
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 = 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 = 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 = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = o;code = 111
char = t;code = 116
char = o;code = 111
char = p;code = 112
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = f;code = 102
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 = 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 = h;code = 104
char = r;code = 114
char = o;code = 111
char = u;code = 117
char = g;code = 103
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = t;code = 116
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 = r;code = 114
char = i;code = 105
char = v;code = 118
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = z;code = 122
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = c;code = 99
char = e;code = 101
char = s;code = 115
char = s;code = 115
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 = d;code = 100
char = i;code = 105
char = f;code = 102
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 = s;code = 115
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 = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = s;code = 115
char = o;code = 111
char = t;code = 116
char = o;code = 111
char = p;code = 112
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = s;code = 115
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 = 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 = a;code = 97
char = z;code = 122
char = o;code = 111
char = l;code = 108
char = i;code = 105
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = t;code = 116
char = w;code = 119
char = e;code = 101
char = e;code = 101
char = n;code = 110
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 = d;code = 100
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = i;code = 105
char = c;code = 99
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = u;code = 117
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 = a;code = 97
char = l;code = 108
char = w;code = 119
char = a;code = 97
char = y;code = 121
char = s;code = 115
char = ;code = 32
char = <;code = 60
char = 0;code = 48
char = .;code = 46
char = 5;code = 53
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ,;code = 44
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
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 = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
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 = 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 = G;code = 71
char = C;code = 67
char = /;code = 47
char = C;code = 67
char = /;code = 47
char = I;code = 73
char = R;code = 82
char = M;code = 77
char = S;code = 83
char = ;code = 32
char = s;code = 115
char = y;code = 121
char = s;code = 115
char = t;code = 116
char = e;code = 101
char = m;code = 109
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 = e;code = 101
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = t;code = 116
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 = l;code = 108
char = s;code = 115
char = o;code = 111
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = a;code = 97
char = r;code = 114
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 = p;code = 112
char = r;code = 114
char = e;code = 101
char = v;code = 118
char = i;code = 105
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = 2;code = 50
char = ,;code = 44
char = 4;code = 52
char = -;code = 45
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = o;code = 111
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 = h;code = 104
char = y;code = 121
char = d;code = 100
char = r;code = 114
char = a;code = 97
char = z;code = 122
char = i;code = 105
char = n;code = 110
char = e;code = 101
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 = z;code = 122
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
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 = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = i;code = 105
char = s;code = 115
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 = u;code = 117
char = l;code = 108
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = ;code = 32
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 = 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 = o;code = 111
char = w;code = 119
char = e;code = 101
char = r;code = 114
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 = e;code = 101
char = r;code = 114
char = r;code = 114
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = d;code = 100
char = e;code = 101
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char = e;code = 101
char = c;code = 99
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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 = .;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 = t;code = 116
char = h;code = 104
char = i;code = 105
char = s;code = 115
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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 = 44
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = ;code = 32
char = 6;code = 54
char = -;code = 45
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = m;code = 109
char = b;code = 98
char = i;code = 105
char = e;code = 101
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char = t;code = 116
char = ;code = 32
char = a;code = 97
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char = m;code = 109
char = o;code = 111
char = s;code = 115
char = p;code = 112
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = m;code = 109
char = a;code = 97
char = l;code = 108
char = d;code = 100
char = e;code = 101
char = h;code = 104
char = y;code = 121
char = d;code = 100
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 = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = e;code = 101
char = c;code = 99
char = u;code = 117
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 = 32
char = c;code = 99
char = o;code = 111
char = l;code = 108
char = l;code = 108
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = ;code = 32
char = 8;code = 56
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = 9;code = 57
char = ;code = 32
char = M;code = 77
char = a;code = 97
char = r;code = 114
char = c;code = 99
char = h;code = 104
char = ;code = 32
char = 2;code = 50
char = 0;code = 48
char = 0;code = 48
char = 5;code = 53
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 = s;code = 115
char = u;code = 117
char = l;code = 108
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
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 = l;code = 108
char = t;code = 116
char = a;code = 97
char = 1;code = 49
char = 3;code = 51
char = C;code = 67
char = ;code = 32
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = u;code = 117
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = a;code = 97
char = t;code = 116
char = m;code = 109
char = o;code = 111
char = s;code = 115
char = p;code = 112
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = m;code = 109
char = a;code = 97
char = l;code = 108
char = d;code = 100
char = e;code = 101
char = h;code = 104
char = y;code = 121
char = d;code = 100
char = e;code = 101
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 = i;code = 105
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = t;code = 116
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 = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
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char = ;code = 32
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char = n;code = 110
char = d;code = 100
char = ;code = 32
char = n;code = 110
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = t;code = 116
char = t;code = 116
char = i;code = 105
char = m;code = 109
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = i;code = 105
char = s;code = 115
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 = o;code = 111
char = v;code = 118
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = i;code = 105
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 = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = o;code = 111
char = u;code = 117
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = p;code = 112
char = e;code = 101
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
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char = n;code = 110
char = d;code = 100
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = y;code = 121
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = v;code = 118
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = d;code = 100
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 = a;code = 97
char = l;code = 108
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = o;code = 111
char = u;code = 117
char = r;code = 114
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char = e;code = 101
char = s;code = 115
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
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char = ;code = 32
char = f;code = 102
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char = m;code = 109
char = a;code = 97
char = l;code = 108
char = d;code = 100
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char = h;code = 104
char = y;code = 121
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result sql = A novel method has been developed for the compound-specific carbon isotope analysis of atmospheric formaldehyde using gas chromatography/combustion/isotope ratio mass spectrometry (GC/C/IRMS). The method allows the determination of the delta13C value for atmospheric formaldehyde at nanogram levels with higher precision and lower detection limit. In the present work, atmospheric formaldehyde was collected using NaHSO3-coated Sep-Pak silica gel cartridges, washed out by water, then derivatized by cysteamine of known delta13C value, and the delta13C value of its derivative (thiazolidine) determined by GC/C/IRMS. Finally, the delta13C value of atmospheric formaldehyde could be calculated by a simple mass balance equation between formaldehyde, cysteamine, and thiazolidine. Using three formaldehydes with different delta13C values, calibration experiments were carried out over large ranges of formaldehyde concentrations. The carbon isotope analysis method achieved excellent reproducibility and high accuracy. There was no carbon isotopic fractionation throughout the derivatization processes. The differences in the carbon isotopic compositions of thiazolidine between the measured and predicted values were always <0.5 per thousand, within the specifications of the GC/C/IRMS system. The present method was also compared with the previous 2,4-dinitrophenylhydrazine derivatization method, and this method could be performed with lower analytical error and detection limit. Using this method, four 6-h ambient atmospheric formaldehyde samples were consecutively collected from 8 to 9 March 2005. The results showed that the delta13C values of atmospheric formaldehyde were different during the daytime and nighttime. This method proved suitable for the routine operation and may provide additional insight on sources and sinks of atmospheric formaldehyde.

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