Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Patent
1991-03-28
1992-04-14
Johnston, Jill
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
422 82, 422 8209, 2101982, G01N 3002
Patent
active
051046229
ABSTRACT:
Biological fluid test samples are analyzed for a broad spectrum of drugs, including benzodiazepines, amphetamines, tricyclic antidepressants and opiates, in a single isocratic analysis using a chromatographic column system containing three analytical columns--an anion exchange column, a reversed phase column and a cation exchange column. A pre-column is also included to purge the sample of salts, proteins, peptides and hydrophilic anions. Carrier liquids containing acetonitrile at various strengths are used for distribution of the various drugs among the columns, elution of the drugs from the columns, and column purging and conditioning. The system readily lends itself to automation, automatic periodic sampling, and component identification and quantification.
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Bio-Rad Laboratories, Inc.
Johnston Jill
Snay Jeffrey R.
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