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char = n;code = 110
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char = m;code = 109
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char = s;code = 115
char = u;code = 117
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char = h;code = 104
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char = g;code = 103
char = h;code = 104
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char = m;code = 109
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char = n;code = 110
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char = e;code = 101
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char = q;code = 113
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char = i;code = 105
char = d;code = 100
char = ;code = 32
char = c;code = 99
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char = t;code = 116
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char = g;code = 103
char = r;code = 114
char = a;code = 97
char = p;code = 112
char = h;code = 104
char = y;code = 121
char = ];code = 93
char = .;code = 46
result sql = [Fluorometric determination of sulfanilamide and sulfaguanidine residues in animal tissues with high-performance-liquid chromatography].
[Fluorometric determination of sulfanilamide and sulfaguanidine residues in animal tissues with high-performance-liquid chromatography].
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char = p;code = 112
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char = k;code = 107
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char = s;code = 115
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char = c;code = 99
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char = ;code = 32
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char = );code = 41
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char = o;code = 111
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char = ;code = 32
char = a;code = 97
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char = C;code = 67
char = .;code = 46
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char = ;code = 32
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char = %;code = 37
char = );code = 41
char = ;code = 32
char = f;code = 102
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char = ;code = 32
char = S;code = 83
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char = .;code = 46
char = ;code = 32
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char = g;code = 103
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char = 0;code = 48
char = .;code = 46
char = 0;code = 48
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char = g;code = 103
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char = g;code = 103
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
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char = S;code = 83
char = G;code = 71
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
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 = c;code = 99
char = l;code = 108
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char = m;code = 109
char = e;code = 101
char = a;code = 97
char = t;code = 116
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char = o;code = 111
char = f;code = 102
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char = w;code = 119
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char = ;code = 32
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char = i;code = 105
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char = e;code = 101
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char = e;code = 101
char = d;code = 100
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char = e;code = 101
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char = s;code = 115
char = c;code = 99
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = j;code = 106
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 = o;code = 111
char = f;code = 102
char = ;code = 32
char = 2;code = 50
char = .;code = 46
char = 1;code = 49
char = ;code = 32
char = g;code = 103
char = ;code = 32
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char = ;code = 32
char = a;code = 97
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char = ;code = 32
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char = 6;code = 54
char = ;code = 32
char = g;code = 103
char = ;code = 32
char = S;code = 83
char = G;code = 71
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 = ;code = 32
char = s;code = 115
char = l;code = 108
char = a;code = 97
char = u;code = 117
char = g;code = 103
char = h;code = 104
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = 2;code = 50
char = 4;code = 52
char = ;code = 32
char = h;code = 104
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
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result sql = A high-performance liquid chromatographic method is presented for the selective analysis of sulphanilamide (SA) and sulphaguanidine (SG) residues in animal tissues (muscle, liver), egg and milk at the 0.01-0.1 mg/kg level. A 25-g amount of the samples was extracted with 90 ml acetonitrile at pH 8.5 to which 2 ml saturated sodium carbonate had been added. After centrifugation, co-extracted water was separated by saturating the extract with sodium chloride and adding 50 ml dichloromethane. The residue of the dried and evaporated organic layer was partitioned between methanol, n-hexane and mobile phase (1 ml each). A 20-microliter volume of the aqueous layer was injected onto a Nucleosil 5 SA column [mobile phase 0.05 M sodium dihydrogenphosphate (adjusted to pH 2.0 with 85% orthophosphoric acid)-methanol, 85:15, v/v]. SA and SG were detected by their native fluorescence (excitation 275 nm, emission 340 nm) at retention times of 7 and 13 min, respectively, without interference of co-extractives. Parallel detection by ultraviolet absorption (275 nm) allowed on-line confirmation of the results. Recovery of spiked samples (0.1 mg/kg) was 80% (coefficient of variation, C.V. = 5%) for SA and 62% (C.V. = 6%) for SG. Concentrations of 0.27 mg/kg for SA and 0.05 mg/kg for SG were analyzed in muscle meat of a swine which received a single intramuscular injection of 2.1 g SA and 0.6 g SG and was slaughtered 24 h later.

Publication: J. Chromatogr. 1987 Dec 25 ;423:217-25.
Publication Date: 1987 Dec 25
Study Author(s): Petz, M;
Institution: Institut für Lebensmittelchemie, Universität Münster, B.R.D.
Shortcut link to this study:
A high-performance liquid chromatographic method is presented for the selective analysis of sulphanilamide (SA) and sulphaguanidine (SG) residues in animal tissues (muscle, liver), egg and milk at the 0.01-0.1 mg/kg level. A 25-g amount of the samples was extracted with 90 ml acetonitrile at pH 8.5 to which 2 ml saturated sodium carbonate had been added. After centrifugation, co-extracted water was separated by saturating the extract with sodium chloride and adding 50 ml dichloromethane. The residue of the dried and evaporated organic layer was partitioned between methanol, n-hexane and mobile phase (1 ml each). A 20-microliter volume of the aqueous layer was injected onto a Nucleosil 5 SA column [mobile phase 0.05 M sodium dihydrogenphosphate (adjusted to pH 2.0 with 85% orthophosphoric acid)-methanol, 85:15, v/v]. SA and SG were detected by their native fluorescence (excitation 275 nm, emission 340 nm) at retention times of 7 and 13 min, respectively, without interference of co-extractives. Parallel detection by ultraviolet absorption (275 nm) allowed on-line confirmation of the results. Recovery of spiked samples (0.1 mg/kg) was 80% (coefficient of variation, C.V. = 5%) for SA and 62% (C.V. = 6%) for SG. Concentrations of 0.27 mg/kg for SA and 0.05 mg/kg for SG were analyzed in muscle meat of a swine which received a single intramuscular injection of 2.1 g SA and 0.6 g SG and was slaughtered 24 h later.
PMID: 3443652

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