International Journal of

Toxicological and Pharmacological Research

e-ISSN: 0975 5160

p-ISSN: 2820-2651

Peer Review Journal

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Published on 25/01/2025

1. Identification of Pregabalin in Human Urine Using Gas Chromatography Mass Spectrometry Method
Elgazali M., Al Naqbi M., Al Hmoudi M., Al Mesmari F., Al Dahmani W.
Abstract
A rapid, simple method is presented for the identification and determination of pregabalin (PREG) in human urine by gas chromatography mass spectrometry (GC/MS) Solid phase extraction was performed using Strata TM-X-C33 µm polymeric strong cation columns (100 mg/3 mL tubes) to collect the extracts. The eluted extract was then derivatized directly in the column using N-methyl-N-(trimethylsilyl) trifluoroacetamide containing 1% trimethylchlorosilane (MSTFA). This method is specific for identifying PREG in urine, even when more than 10 different drugs of abuse are present. It easily detects both PREG-H2O MSTFA and PREG 2MSTFA, which have a relative retention time (RRt) of 0.9. At 1000 ng/ml, absolute recovery is 94.2%. Within-day precision (CV%, n=5) is 8.1% for PREG 250 and 0.3% for 1000 ng/ml. The method demonstrates linearity over 250-1000 ng/mL, with a limit of detection (LOD) of 250 ng/mL and a limit of quantitation (LOQ) of 500 ng/mL. These results show the method is highly suitable for routine identification of the drug in toxicology trace analysis.

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