منابع مشابه
Determination of chromate adulteration of human urine by automated colorimetric and capillary ion electrophoretic analyses.
Various chemicals can be added to urine specimens collected for drug analysis to abnormally elevate ionic concentrations and/or interfere with either immunoassay urine drug-screening procedures or gas chromatographic-mass spectrometric confirmation techniques. One such adulterant, "Urine Luck" (formula 5.3), has been identified in our previous research to contain potassium dichromate. Screening...
متن کاملBlack Urine
A 2-year-old boy was born at term of healthy, non-consanguineous Iranian parents. His mother attended in the clinic with the history of sometimes discoloration of diapers after passing urine. She noticed that first at the age of one month with intensified in recent months. His Physical examination and growth parameters were normal. His mother denied taking any medication (sorbitol, nitrofuranto...
متن کاملhydrochlorothiazide detection in urine samples by hplc-dad and experimental design dispersive l-l microextraction
hydrochlorothiazide (hct) is a diuretic agent which is shown to be effective in the treatment of hypertension. literature reports have demonstrated that urinary excretion data may be used to assess the bioavailability of various formulations containing this thiazide. also hct consumption by the athletes is one of the drugs which should be regulated by world anti-doping agency (wada), because of...
Investigation of nitrite adulteration on the immunoassay and GC-MS analysis of cannabinoids in urine specimens.
Nitrite ion has been identified as the active ingredient of two commercial adulterants that could cause discrepant results between the immunoassay screening and gas chromatographic-mass spectrometric (GC-MS) confirmation of 11-nor-delta9-tetrahydrocannabinol-9-carboxylic acid (THCCOOH) in urine. Procedures to chemically convert the nitrite ion at the beginning of sample preparation for GC-MS an...
متن کاملIntegrity of Urine Specimens for Toxicological Analysis - Adulteration, Mechanisms of Action, and Laboratory Detection.
Drug testing in urine for employees is an important deterrent for drug abuse. Because of the dire consequences of a positive result, many individuals who might otherwise test positive will go to great lengths to escape detection. The term "adulteration" in this context refers to: substitution of drug-free urine, purposeful ingestion of agents or fluids designed to either accelerate drug clearan...
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ژورنال
عنوان ژورنال: Clinical Chemistry
سال: 1999
ISSN: 0009-9147,1530-8561
DOI: 10.1093/clinchem/45.7.1051