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1.
Metabolism of [14C]sulfamethazine in swine.
Giera, D D; Sieck, R F; Graper, L K; Mertz, J L; Herberg, R J.
J Agric Food Chem ; 30(2): 263-6, 1982.
Article in English | MEDLINE | ID: mdl-7069066

Subject(s)
Sulfamethazine/metabolism , Swine/metabolism , Adipose Tissue/metabolism , Animals , Feces/analysis , Kidney/metabolism , Liver/metabolism , Male , Maximum Allowable Concentration , Muscles/metabolism
2.
Bioavailability and safety of nonextractable bound drug-related residues.
Sieck, R F.
J Toxicol Environ Health ; 2(4): 847, 1977 Mar.
Article in English | MEDLINE | ID: mdl-853541

Subject(s)
Pharmaceutical Preparations/metabolism , Biological Availability , Drug-Related Side Effects and Adverse Reactions , Radioisotopes
3.
Gas chromatographic analysis of oryzalin residues in agricultural crops and soil.
Sieck, R F; Johnson, W S; Cockerill, A F; Mallen, D N; Osborne, D J; Barton, S J.
J Agric Food Chem ; 24(3): 617-20, 1976.
Article in English | MEDLINE | ID: mdl-944730

Subject(s)
Glycine max/analysis , Herbicides/analysis , Soil Pollutants/analysis , Sulfanilamides/analysis , Chromatography, Gas/methods , Dinitrobenzenes , Food Contamination/analysis , Pesticide Residues/analysis
4.
The confirmation of diethylstilbestrol residues in beff liver by gas chromatography-mass spectrometry.
Day, E W; Vanatta, L E; Sieck, R F.
J Assoc Off Anal Chem ; 58(3): 520-4, 1975 May.
Article in English | MEDLINE | ID: mdl-1141179

ABSTRACT

A confirmatory test for the presence of the growth-promoting hormone, diethylstilbestrol (DES), in beef liver is described, Samples are subjected to a published electron capture gas chromatographic method that involves the formation and measurement of the bis-dichloroacetyl derivative of DES. The presence of the derivative is then confirmed by gas chromatography-mass spectrometry, using a repetitive scanning technique to maximize response. The isotope pattern of the tetrachlorinated molecular ion greatly facilitates the confirmation.


Subject(s)
Diethylstilbestrol/analysis , Liver/analysis , Adipose Tissue/analysis , Animals , Cattle , Chromatography, Gas , Kidney/analysis , Mass Spectrometry , Methods
5.
Gas chromatographic determination of diethylstilbestrol and its glucuronide in cattle tissues.
Donoho, A L; Johnson, W S; Sieck, R F; Sullivan, W L.
J Assoc Off Anal Chem ; 56(4): 785-92, 1973 Jul.
Article in English | MEDLINE | ID: mdl-4781286

Subject(s)
Diethylstilbestrol/analysis , Glucuronates/analysis , Adipose Tissue/analysis , Animals , Cattle , Chromatography, Gas , Hydrogen-Ion Concentration , Kidney/analysis , Liver/analysis , Male , Methods , Microchemistry , Muscles/analysis
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