期刊
FORENSIC TOXICOLOGY
卷 38, 期 1, 页码 255-263出版社
SPRINGER
DOI: 10.1007/s11419-019-00483-0
关键词
N-Ethylpentylone; New psychoactive substances; Forensic toxicology; Case report; Fatal intoxication
类别
Purpose We present a fully validated method for determination of N-ethylpentylone in biological material and a case report of fatal intoxication with N-ethylpentylone. Methods Blood and urine samples were extracted with ethyl acetate from alkaline medium (pH 9). The analysis was carried out using ultra-high-performance liquid chromatography-tandem mass spectrometry. MDMA-d(5) was used as the internal standard. Validation criteria were evaluated for blank blood and urine at concentrations of 10 and 100 ng/mL. Results The validation parameters were as follows: lower limit of quantification: 1 ng/mL for blood and urine, coefficient of determination: blood > 0.9996, urine > 0.9975, precision for 10 and 100 ng/mL, respectively: blood 4.87% and 4.47%, urine 1.93% and 2.43%, accuracy for 10 and 100 ng/mL, respectively: blood 14.7% and -2.95%, urine 19.1% and 2.10%, recovery for 10 and 100 ng/mL, respectively: blood 91.5% and 100.2%, urine 97.4% and 96.7%, matrix effect in blood was 127% and 117% for 10 and 100 ng/mL, respectively, in urine 124% and 117% for 10 and 100 ng/mL, respectively. In the present case of fatal intoxication with N-ethylpentylone, the determined concentration of this substance was 10.6 mu g/mL in peripheral blood and 17.6 mu g/mL in urine. In both materials, four metabolites of N-ethylpentylone were determined qualitatively. Conclusion The developed method enables the determination of N-ethylpentylone with high sensitivity and selectivity. The method was used to make determinations in biological material in the case of fatal intoxication with N-ethylpentylone.
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