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A novel approach to the quantification of urinary aryl-propionamide-derived SARMs by UHPLC-MS/MS.
Biomedical Chromatography : BMC 2020 January
A simple and sensitive procedure for the quantification of two commonly abused aryl-propionamide-derived selective androgen receptor modulators (SARMs), namely S-4 (GTx-007, andarine) and S-22 (GTx-024, MK-2866, ostarine, enobosarm), has been described. Urine samples were prepared for analysis by means of a dispersive liquid-liquid microextraction using methanol and chloroform as dispersive and extracting solvents, respectively. Factors that might influence the extraction process as well as their optimum conditions were evaluated by Box-Benken and central composite designs. After extraction, the analytes were quantified by UHPLC-MS/MS. The proposed procedure was validated on human urine samples. As a result, for both SARMs the detection limits were observed at 0.05 ng/mL and calibration curves were linear in the concentration range of 0.25-50 ng/mL with the coefficient of determination of 0.998.
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