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Capillary Ion Electrophoresis on Endogenous Anions and Anionic Adulterants in Human Urine

NCJ Number
188966
Journal
Journal of Forensic Sciences Volume: 46 Issue: 3 Dated: May 2001 Pages: 615-626
Author(s)
Kenneth E. Ferslew Ph.D.; Andrea N. Hagardorn B.S.; Timothy A. Robert Ph.D.
Date Published
May 2001
Length
12 pages
Annotation
This study examined the application of capillary ion electrophoresis for the direct detection of endogenous anions and anionic adulterants in human urine.
Abstract
Capillary ion electrophoresis (CIE) was performed using a Waters Quanta 4000 Capillary Electrophoresis System with either direct or indirect ultraviolet absorption detection of 254 mm. Thirty random normal urine specimens and 21 specimens suspected of adulteration were tested. Duplicate aliquots were assayed by CIE and by colorimetric technique for nitrite. Sixteen specimens had elevated concentrations of nitrite and/or nitrate. The correlation coefficient between nitrite CIE and colorimetric results was 0.9895. Three specimens had detectable concentrations of chromate and were suspected of being adulterated with "Urine Luck," a commercial adulterant found to contain chromate. Two specimens suspected of being adulterated with bleach contained only chloride, sulfate, and phosphate. The study concludes that CIE is applicable to forensic analysis of urine anion concentrations. Finally, the process can easily quantitate numerous endogenous anions and offers a method to detect and/or confirm anion adulteration of urine specimens. Figures, tables, references