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  • Title: False-positive postmortem EMIT drugs-of-abuse assay due to lactate dehydrogenase and lactate in urine.
    Author: Sloop G, Hall M, Simmons GT, Robinson CA.
    Journal: J Anal Toxicol; 1995; 19(7):554-6. PubMed ID: 8577177.
    Abstract:
    Three cases of multiple false-positive drug tests are described. Postmortem urine specimens were screened using the enzyme-multiplied immunoassay technique. All patients had proteinuria and lactic aciduria. These false-positive reactions were due to the presence of lactate dehydrogenase (LDH), lactic acid, and protein. This finding was confirmed by creating a multiple false-positive sample with a solution of LDH and lactate in 5% bovine serum albumin at pH 6.
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