Determination of a robust headspace GC-MS/MS method for analysis of ethyl alcohol and acetaldehyde: clinical application to pharmacokinetics study.

Due to the forensic aspects of drinking and exposure to toxic substances, more sophisticated quantitative technology is needed to quantify the concentration of ethyl alcohol and acetaldehyde in the blood. In this study, we developed a headspace gas chromatography tandem mass spectrometry method that could simultaneously detect ethyl alcohol and acetaldehyde in human plasma. Through a simple preparation process, ethyl alcohol and acetaldehyde were quickly detected within 4 min, and a lower limit of quantification (LLOQ) (20 and 0.2 µg/mL) was obtained; these results confirmed the suitability of the system. According to Food and Drug Administration guidelines, the linearity (correlation coefficient > 0.9996), intraday and intraday accuracy, precision, and both short- and long-term stability and freeze-thaw stability satisfied the evaluation criteria (within 100.0 ± 15.0% and 20.0% of the LLOQ). Carryover and batch size assessment for the evaluation of the sample influence during analysis also satisfied the evaluation criteria. A valid method was applied to the pharmacokinetics study, and the plasma from 43 subjects after oral administration of the placebo or HK-GCM-H01 was analyzed. The developed analysis method for ethyl alcohol and acetaldehyde in blood could be used in various fields, such as forensics and those requiring precise quantification.