Výsledky vyhledávání - "William A. Joern"

Confirmation of Low Concentrations of Urinary Benzodiazepines, Including Alprazolam and Triazolam, by GC/MS: An Extractive Alkylation Procedure

Autor: William A. Joern

Publikováno v: Journal of Analytical Toxicology. 16:363-367

Urine samples containing diazolo- and triazolobenzodiazepines and metabolites were hydrolyzed with beta-glucuronidase and extracted with methylene chloride. The extracts were treated with methyl iodide, methylene chloride, and tetrahexylammonium hydr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a973033e8119ff0bfdb30447e9ea8fd
https://doi.org/10.1093/jat/16.6.363

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Unexpected volatility of barbiturate derivatives: an extractive alkylation procedure for barbiturates and benzoylecgonine

Autor: William A. Joern

Publikováno v: Journal of analytical toxicology. 18(7)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::532826d0745dad5a2e4c48aa681e50cb
https://pubmed.ncbi.nlm.nih.gov/7861758

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Surface adsorption of the urinary marijuana carboxy metabolite: the problem and a partial solution

Autor: William A. Joern

Publikováno v: Journal of analytical toxicology. 16(6)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1253270f731ca28cd30fb99261e9507
https://pubmed.ncbi.nlm.nih.gov/8127088

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GC/MS assay of the marijuana carboxy metabolite: urine interference with the dimethyl derivative

Autor: William A. Joern

Publikováno v: Journal of analytical toxicology. 16(3)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15aaa964be63e0566a2de4d04ebe8e49
https://pubmed.ncbi.nlm.nih.gov/1326062

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Ion Ratio Instability of a GC/MS System is Related to Fluctuations in Room Air Flow

Autor: William A. Joern

Publikováno v: Journal of Analytical Toxicology. 17:122-122

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d240842f7b2f5efba3264a90bcf62db
https://doi.org/10.1093/jat/17.2.122

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Detection of Past and Recurrent Marijuana Use By a Modified GC/MS Procedure

Autor: William A. Joern

Publikováno v: Journal of Analytical Toxicology. 11:49-52

A published gas chromatography/mass spectrometry method for detecting 11-nor-9-carboxy-delta-9-tetrahydrocannabinol (THC-COOH) in urine was modified. In the new procedure, five GC/MS ion peaks of a pentafluoropropylpentafluoropropionyl derivative of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d86534ef9900217d581a2f2aa44e8708
https://doi.org/10.1093/jat/11.2.49

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Detection of Alprazolam (Xanax) and Its Metabolites in Urine Using Dual Capillary Column, Dual Nitrogen Detector Gas Chromatography

Autor: Ann B. Joern, William A. Joern

Publikováno v: Journal of Analytical Toxicology. 11:247-251

Alprazolam (Xanax) is a fairly new, yet very popular benzodiazepine tranquilizer. In 1985, it was 6th on a nationwide list of drugs mentioned in emergency room drug poisonings. A procedure was developed that allows alprazolam and its main urinary met

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bba79faafa09f435c8aedf3120f70b3c
https://doi.org/10.1093/jat/11.6.247

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