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- W1952039056 abstract "Gamma-hydroxybutyric acid has a short half-life in the human body and may be determined at less than 8 h in blood and 12 h in urine. Consequently, the sensitivity of the instrumentation and the extraction procedure for gamma-hydroxybutyric acid from biological samples are important factors in its determination. In this study, solid-phase extraction was compared to the commonly used liquid–liquid extraction with analysis by gas chromatography—mass spectrometry. Solid-phase extraction enhanced the recovery of 0.5, 1.0, 2.5, 5.0, and 10.0 mg/L gamma-hydroxybutyric acid. The recovery for gamma-hydroxybutyric acid by solid-phase extraction was 64.5–70.9% compared to 32.6–47.5% by liquid–liquid extraction. Solid-phase extraction also offered shorter analysis time, smaller sample quantities and solvent volumes, and better separation. Solid phase extraction for gamma-hydroxybutyric acid analysis in urine was fully validated and the results were satisfactory. Both extraction methods were used to analyze urine from an individual that was sexually assaulted. Significant differences were observed in the concentrations of the gamma-hydroxybutyric acid with values of 148.07 and 233.15 µg/mL by liquid–liquid extraction and solid-phase extraction, respectively." @default.
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- W1952039056 date "2015-09-30" @default.
- W1952039056 modified "2023-10-12" @default.
- W1952039056 title "Determination of Gamma-Hydroxybutyric Acid in Urine by Solid Phase Extraction and Gas Chromatography—Mass Spectrometry" @default.
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- W1952039056 doi "https://doi.org/10.1080/00032719.2015.1067814" @default.
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