char = F;code = 70 char = l;code = 108 char = o;code = 111 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 = 45 char = s;code = 115 char = p;code = 112 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = r;code = 114 char = o;code = 111 char = p;code = 112 char = h;code = 104 char = o;code = 111 char = t;code = 116 char = o;code = 111 char = m;code = 109 char = e;code = 101 char = t;code = 116 char = r;code = 114 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = m;code = 109 char = e;code = 101 char = r;code = 114 char = c;code = 99 char = u;code = 117 char = r;code = 114 char = y;code = 121 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 = i;code = 105 char = o;code = 111 char = d;code = 100 char = i;code = 105 char = d;code = 100 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = f;code = 102 char = e;code = 101 char = r;code = 114 char = r;code = 114 char = o;code = 111 char = i;code = 105 char = n;code = 110 char = .;code = 46 result sql = Flotation-spectrophotometric determination of mercury in water samples using iodide and ferroin.
Flotation-spectrophotometric determination of mercury in water samples using iodide and ferroin.char = T;code = 84 char = h;code = 104 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = p;code = 112 char = a;code = 97 char = p;code = 112 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = s;code = 115 char = c;code = 99 char = r;code = 114 char = i;code = 105 char = b;code = 98 char = e;code = 101 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = s;code = 115 char = i;code = 105 char = m;code = 109 char = p;code = 112 char = l;code = 108 char = e;code = 101 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 = l;code = 108 char = y;code = 121 char = ;code = 32 char = s;code = 115 char = e;code = 101 char = l;code = 108 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = v;code = 118 char = e;code = 101 char = ;code = 32 char = m;code = 109 char = e;code = 101 char = t;code = 116 char = h;code = 104 char = o;code = 111 char = d;code = 100 char = ;code = 32 char = f;code = 102 char = o;code = 111 char = r;code = 114 char = ;code = 32 char = s;code = 115 char = e;code = 101 char = p;code = 112 char = a;code = 97 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 = 44 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = e;code = 101 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 = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = s;code = 115 char = p;code = 112 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = r;code = 114 char = o;code = 111 char = p;code = 112 char = h;code = 104 char = o;code = 111 char = t;code = 116 char = o;code = 111 char = m;code = 109 char = e;code = 101 char = t;code = 116 char = r;code = 114 char = i;code = 105 char = c;code = 99 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = r;code = 114 char = a;code = 97 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = m;code = 109 char = o;code = 111 char = u;code = 117 char = n;code = 110 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = m;code = 109 char = e;code = 101 char = r;code = 114 char = c;code = 99 char = u;code = 117 char = r;code = 114 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 = m;code = 109 char = e;code = 101 char = t;code = 116 char = h;code = 104 char = o;code = 111 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = b;code = 98 char = a;code = 97 char = s;code = 115 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = f;code = 102 char = l;code = 108 char = o;code = 111 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 = o;code = 111 char = f;code = 102 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = ;code = 32 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = -;code = 45 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 = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = H;code = 72 char = g;code = 103 char = I;code = 73 char = 4;code = 52 char = (;code = 40 char = 2;code = 50 char = -;code = 45 char = );code = 41 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = f;code = 102 char = e;code = 101 char = r;code = 114 char = r;code = 114 char = o;code = 111 char = i;code = 105 char = n;code = 110 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 = 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 = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = n;code = 110 char = -;code = 45 char = h;code = 104 char = e;code = 101 char = p;code = 112 char = t;code = 116 char = a;code = 97 char = n;code = 110 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = f;code = 102 char = a;code = 97 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = t;code = 116 char = ;code = 32 char = p;code = 112 char = H;code = 72 char = ;code = 32 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 = i;code = 105 char = o;code = 111 char = n;code = 110 char = -;code = 45 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 = ;code = 32 char = w;code = 119 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = n;code = 110 char = ;code = 32 char = s;code = 115 char = e;code = 101 char = p;code = 112 char = a;code = 97 char = r;code = 114 char = a;code = 97 char = t;code = 116 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 = d;code = 100 char = i;code = 105 char = s;code = 115 char = s;code = 115 char = o;code = 111 char = l;code = 108 char = v;code = 118 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = 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 = t;code = 116 char = o;code = 111 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 = ;code = 32 char = i;code = 105 char = t;code = 116 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = b;code = 98 char = s;code = 115 char = o;code = 111 char = r;code = 114 char = b;code = 98 char = a;code = 97 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = .;code = 46 char = ;code = 32 char = Q;code = 81 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 = f;code = 102 char = l;code = 108 char = o;code = 111 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 = 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 = i;code = 105 char = o;code = 111 char = n;code = 110 char = -;code = 45 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 = ;code = 32 char = w;code = 119 char = a;code = 97 char = s;code = 115 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 = w;code = 119 char = h;code = 104 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 = v;code = 118 char = o;code = 111 char = l;code = 108 char = u;code = 117 char = m;code = 109 char = e;code = 101 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 = 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 = ;code = 32 char = c;code = 99 char = o;code = 111 char = n;code = 110 char = t;code = 116 char = a;code = 97 char = i;code = 105 char = n;code = 110 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = H;code = 72 char = g;code = 103 char = (;code = 40 char = I;code = 73 char = I;code = 73 char = );code = 41 char = ;code = 32 char = w;code = 119 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = v;code = 118 char = a;code = 97 char = r;code = 114 char = i;code = 105 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = o;code = 111 char = v;code = 118 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = 5;code = 53 char = 0;code = 48 char = ;code = 32 char = -;code = 45 char = ;code = 32 char = 8;code = 56 char = 0;code = 48 char = 0;code = 48 char = ;code = 32 char = m;code = 109 char = l;code = 108 char = .;code = 46 char = ;code = 32 char = B;code = 66 char = e;code = 101 char = e;code = 101 char = r;code = 114 char = ';code = 39 char = s;code = 115 char = ;code = 32 char = l;code = 108 char = a;code = 97 char = w;code = 119 char = ;code = 32 char = w;code = 119 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = o;code = 111 char = b;code = 98 char = e;code = 101 char = y;code = 121 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = o;code = 111 char = v;code = 118 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = t;code = 116 char = h;code = 104 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 = ;code = 32 char = r;code = 114 char = a;code = 97 char = n;code = 110 char = g;code = 103 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = 3;code = 51 char = .;code = 46 char = 2;code = 50 char = ;code = 32 char = x;code = 120 char = ;code = 32 char = 1;code = 49 char = 0;code = 48 char = (;code = 40 char = -;code = 45 char = 8;code = 56 char = );code = 41 char = ;code = 32 char = -;code = 45 char = ;code = 32 char = 9;code = 57 char = .;code = 46 char = 5;code = 53 char = ;code = 32 char = x;code = 120 char = ;code = 32 char = 1;code = 49 char = 0;code = 48 char = (;code = 40 char = -;code = 45 char = 7;code = 55 char = );code = 41 char = ;code = 32 char = m;code = 109 char = o;code = 111 char = l;code = 108 char = ;code = 32 char = l;code = 108 char = (;code = 40 char = -;code = 45 char = 1;code = 49 char = );code = 41 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = ;code = 32 char = a;code = 97 char = p;code = 112 char = p;code = 112 char = a;code = 97 char = r;code = 114 char = e;code = 101 char = n;code = 110 char = t;code = 116 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 = v;code = 118 char = i;code = 105 char = t;code = 116 char = y;code = 121 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = 1;code = 49 char = ;code = 32 char = x;code = 120 char = ;code = 32 char = 1;code = 49 char = 0;code = 48 char = (;code = 40 char = 6;code = 54 char = );code = 41 char = ;code = 32 char = l;code = 108 char = ;code = 32 char = m;code = 109 char = o;code = 111 char = l;code = 108 char = (;code = 40 char = -;code = 45 char = 1;code = 49 char = );code = 41 char = ;code = 32 char = c;code = 99 char = m;code = 109 char = (;code = 40 char = -;code = 45 char = 1;code = 49 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 = ;code = 32 char = 5;code = 53 char = 0;code = 48 char = 0;code = 48 char = ;code = 32 char = m;code = 109 char = l;code = 108 char = ;code = 32 char = a;code = 97 char = l;code = 108 char = i;code = 105 char = q;code = 113 char = u;code = 117 char = o;code = 111 char = t;code = 116 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 = 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 = .;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 = e;code = 101 char = t;code = 116 char = e;code = 101 char = c;code = 99 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = l;code = 108 char = i;code = 105 char = m;code = 109 char = i;code = 105 char = t;code = 116 char = ;code = 32 char = (;code = 40 char = n;code = 110 char = ;code = 32 char = =;code = 61 char = ;code = 32 char = 2;code = 50 char = 5;code = 53 char = );code = 41 char = ;code = 32 char = w;code = 119 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = 6;code = 54 char = .;code = 46 char = 2;code = 50 char = ;code = 32 char = x;code = 120 char = ;code = 32 char = 1;code = 49 char = 0;code = 48 char = (;code = 40 char = -;code = 45 char = 9;code = 57 char = );code = 41 char = ;code = 32 char = m;code = 109 char = o;code = 111 char = l;code = 108 char = ;code = 32 char = l;code = 108 char = (;code = 40 char = -;code = 45 char = 1;code = 49 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 = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = R;code = 82 char = S;code = 83 char = D;code = 68 char = ;code = 32 char = (;code = 40 char = n;code = 110 char = ;code = 32 char = =;code = 61 char = ;code = 32 char = 5;code = 53 char = );code = 41 char = ;code = 32 char = f;code = 102 char = o;code = 111 char = r;code = 114 char = ;code = 32 char = 3;code = 51 char = .;code = 46 char = 1;code = 49 char = 9;code = 57 char = ;code = 32 char = x;code = 120 char = ;code = 32 char = 1;code = 49 char = 0;code = 48 char = (;code = 40 char = -;code = 45 char = 7;code = 55 char = );code = 41 char = ;code = 32 char = m;code = 109 char = o;code = 111 char = l;code = 108 char = ;code = 32 char = l;code = 108 char = (;code = 40 char = -;code = 45 char = 1;code = 49 char = );code = 41 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = H;code = 72 char = g;code = 103 char = (;code = 40 char = I;code = 73 char = I;code = 73 char = );code = 41 char = ;code = 32 char = w;code = 119 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = 1;code = 49 char = .;code = 46 char = 9;code = 57 char = %;code = 37 char = .;code = 46 char = ;code = 32 char = A;code = 65 char = ;code = 32 char = n;code = 110 char = o;code = 111 char = t;code = 116 char = a;code = 97 char = b;code = 98 char = l;code = 108 char = e;code = 101 char = ;code = 32 char = a;code = 97 char = d;code = 100 char = v;code = 118 char = a;code = 97 char = n;code = 110 char = t;code = 116 char = a;code = 97 char = g;code = 103 char = e;code = 101 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = m;code = 109 char = e;code = 101 char = t;code = 116 char = h;code = 104 char = o;code = 111 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = s;code = 115 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 = t;code = 116 char = e;code = 101 char = r;code = 114 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = H;code = 72 char = g;code = 103 char = (;code = 40 char = I;code = 73 char = I;code = 73 char = );code = 41 char = ;code = 32 char = i;code = 105 char = s;code = 115 char = ;code = 32 char = f;code = 102 char = r;code = 114 char = e;code = 101 char = e;code = 101 char = ;code = 32 char = f;code = 102 char = r;code = 114 char = o;code = 111 char = m;code = 109 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = f;code = 102 char = e;code = 101 char = r;code = 114 char = e;code = 101 char = n;code = 110 char = c;code = 99 char = e;code = 101 char = ;code = 32 char = 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 = a;code = 97 char = l;code = 108 char = m;code = 109 char = o;code = 111 char = s;code = 115 char = t;code = 116 char = ;code = 32 char = a;code = 97 char = l;code = 108 char = l;code = 108 char = ;code = 32 char = c;code = 99 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = s;code = 115 char = ;code = 32 char = f;code = 102 char = o;code = 111 char = u;code = 117 char = n;code = 110 char = d;code = 100 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 = 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 = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = w;code = 119 char = a;code = 97 char = s;code = 115 char = t;code = 116 char = e;code = 101 char = ;code = 32 char = w;code = 119 char = a;code = 97 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = ;code = 32 char = s;code = 115 char = a;code = 97 char = m;code = 109 char = p;code = 112 char = l;code = 108 char = e;code = 101 char = s;code = 115 char = .;code = 46 char = ;code = 32 char = T;code = 84 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = d;code = 100 char = e;code = 101 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = m;code = 109 char = i;code = 105 char = n;code = 110 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = o;code = 111 char = n;code = 110 char = ;code = 32 char = o;code = 111 char = f;code = 102 char = ;code = 32 char = H;code = 72 char = g;code = 103 char = (;code = 40 char = I;code = 73 char = I;code = 73 char = );code = 41 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = t;code = 116 char = a;code = 97 char = p;code = 112 char = ,;code = 44 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 = w;code = 119 char = a;code = 97 char = s;code = 115 char = t;code = 116 char = e;code = 101 char = ,;code = 44 char = ;code = 32 char = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = s;code = 115 char = e;code = 101 char = a;code = 97 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 = w;code = 119 char = a;code = 97 char = s;code = 115 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 = b;code = 98 char = y;code = 121 char = ;code = 32 char = t;code = 116 char = h;code = 104 char = e;code = 101 char = ;code = 32 char = p;code = 112 char = r;code = 114 char = e;code = 101 char = s;code = 115 char = e;code = 101 char = n;code = 110 char = 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 = a;code = 97 char = n;code = 110 char = d;code = 100 char = ;code = 32 char = a;code = 97 char = ;code = 32 char = w;code = 119 char = e;code = 101 char = l;code = 108 char = l;code = 108 char = -;code = 45 char = e;code = 101 char = s;code = 115 char = t;code = 116 char = a;code = 97 char = b;code = 98 char = l;code = 108 char = i;code = 105 char = s;code = 115 char = h;code = 104 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = 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 = o;code = 111 char = f;code = 102 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 = 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 = t;code = 116 char = h;code = 104 char = i;code = 105 char = z;code = 122 char = o;code = 111 char = n;code = 110 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 = 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 = e;code = 101 char = r;code = 114 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = a;code = 97 char = t;code = 116 char = i;code = 105 char = s;code = 115 char = f;code = 102 char = a;code = 97 char = c;code = 99 char = t;code = 116 char = o;code = 111 char = r;code = 114 char = i;code = 105 char = l;code = 108 char = y;code = 121 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = m;code = 109 char = p;code = 112 char = a;code = 97 char = r;code = 114 char = a;code = 97 char = b;code = 98 char = l;code = 108 char = e;code = 101 char = ;code = 32 char = s;code = 115 char = o;code = 111 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 = a;code = 97 char = p;code = 112 char = p;code = 112 char = l;code = 108 char = i;code = 105 char = c;code = 99 char = a;code = 97 char = 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 = 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 = 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 = w;code = 119 char = a;code = 97 char = s;code = 115 char = ;code = 32 char = c;code = 99 char = o;code = 111 char = n;code = 110 char = f;code = 102 char = i;code = 105 char = r;code = 114 char = m;code = 109 char = e;code = 101 char = d;code = 100 char = ;code = 32 char = i;code = 105 char = n;code = 110 char = ;code = 32 char = e;code = 101 char = n;code = 110 char = c;code = 99 char = o;code = 111 char = u;code = 117 char = n;code = 110 char = t;code = 116 char = e;code = 101 char = r;code = 114 char = i;code = 105 char = n;code = 110 char = g;code = 103 char = ;code = 32 char = w;code = 119 char = i;code = 105 char = t;code = 116 char = h;code = 104 char = ;code = 32 char = r;code = 114 char = e;code = 101 char = a;code = 97 char = l;code = 108 char = ;code = 32 char = s;code = 115 char = a;code = 97 char = m;code = 109 char = p;code = 112 char = l;code = 108 char = e;code = 101 char = s;code = 115 char = .;code = 46 char = <;code = 60 char = b;code = 98 char = r;code = 114 char = /;code = 47 char = >;code = 62 result sql = This paper describes a simple and highly selective method for separation, preconcentration and spectrophotometric determination of trace amounts of mercury. The method is based on the flotation of an ion-associate of HgI4(2-) and ferroin between aqueous and n-heptane interface at pH 5. The ion-associate was then separated and dissolved in acetonitrile to measure its absorbance. Quantitative flotation of the ion-associate was achieved when the volume of the water sample containing Hg(II) was varied over 50 - 800 ml. Beer's law was obeyed over the concentration range of 3.2 x 10(-8) - 9.5 x 10(-7) mol l(-1) with an apparent molar absorptivity of 1 x 10(6) l mol(-1) cm(-1) for a 500 ml aliquot of the water sample. The detection limit (n = 25) was 6.2 x 10(-9) mol l(-1), and the RSD (n = 5) for 3.19 x 10(-7) mol l(-1) of Hg(II) was 1.9%. A notable advantage of the method is that the determination of Hg(II) is free from the interference of the almost all cations and anions found in the environmental and waste water samples. The determination of Hg(II) in tap, synthetic waste, and seawater samples was carried out by the present method and a well-established method of extraction with dithizone. The results were satisfactorily comparable so that the applicability of the proposed method was confirmed in encountering with real samples.
Publication: Anal Sci 2004 Oct ;20(10)::1449-52.
Publication Date: 2004 Oct
Study Author(s): Hosseini, Mohammad Saeid;Hashemi-Moghaddam, Hamid;
Institution: Department of Chemistry, Faculty of Science, Birjand University, Birjand, Iran.
[email protected]
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This paper describes a simple and highly selective method for separation, preconcentration and spectrophotometric determination of trace amounts of mercury. The method is based on the flotation of an ion-associate of HgI4(2-) and ferroin between aqueous and n-heptane interface at pH 5. The ion-associate was then separated and dissolved in acetonitrile to measure its absorbance. Quantitative flotation of the ion-associate was achieved when the volume of the water sample containing Hg(II) was varied over 50 - 800 ml. Beer's law was obeyed over the concentration range of 3.2 x 10(-8) - 9.5 x 10(-7) mol l(-1) with an apparent molar absorptivity of 1 x 10(6) l mol(-1) cm(-1) for a 500 ml aliquot of the water sample. The detection limit (n = 25) was 6.2 x 10(-9) mol l(-1), and the RSD (n = 5) for 3.19 x 10(-7) mol l(-1) of Hg(II) was 1.9%. A notable advantage of the method is that the determination of Hg(II) is free from the interference of the almost all cations and anions found in the environmental and waste water samples. The determination of Hg(II) in tap, synthetic waste, and seawater samples was carried out by the present method and a well-established method of extraction with dithizone. The results were satisfactorily comparable so that the applicability of the proposed method was confirmed in encountering with real samples.
PMID: 15524200