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Evaluation of a commercial radioimmunoassay kit for the detection of lysergide (LSD) in serum, whole blood, urine and stomach contents
Authors:D Altunkaya  R N Smith
Affiliation:Metropolitan Police Forensic Science Laboratory, London, U.K.
Abstract:The Diagnostic Products Corporation Coat-A-Count radioimmunoassay kit for LSD in urine has been evaluated for use in forensic toxicology with a variety of sample types. The cut-offs (defined as the mean response of blank samples plus three standard deviation) for LSD in serum, haemolysed whole blood, urine and stomach contents were 0.06, 0.050-0.055, 0.18 and 0.18 ng/ml, respectively. Preliminary extraction of LSD from the samples is not usually necessary. The precision of the analysis and the recoveries from spiked samples were satisfactory. The cross-reactivities of 2-oxo-LSD, lysergic acid methyl propylamide, lysergic acid monoethylamide and nor-LSD were estimated to be 11,6,2 and 1% respectively relative to LSD (100%).
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