SPME-HPLC-MS同时检测尿液中氯胺酮与MDMA及其体内主要代谢物
Detection of ketamine, MDMA and their main metabolites in urine samples by SPME-HPLC-MS
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摘要: 建立尿液中氯胺酮和3,4-亚甲二氧基甲基苯丙胺(MDMA)及其主要代谢物去甲氯胺酮和3,4-亚甲二氧基苯丙胺(MDA)固相微萃取-液相色谱-质谱联用的含量测定方法。在添加定量氯胺酮、去甲氯胺酮、MDMA和MDA对照品的尿液试样中,调节pH 11,加入固体Na2CO3,60 ℃下加热搅拌,用60 μm聚二甲基硅烷-二乙烯基苯(PDMS/DVB)共聚物萃取头萃取15 min,HPLC-MS检测。在0.03~1.0 μg/mL范围内线性关系良好,相关系数r≥0.999 2,最小检测限为0.01 μg/mL,平均回收率均在97.19%~105.44%之间,RSD均在10%以内。该方法操作简单、安全性高、结果准确,可用于测定尿液中氯胺酮与MDMA及其体内主要代谢物。Abstract: To establish a method for the determination of ketamine and MDA and their main metabolites in urine by solid phase microextraction-liquid chromatography-mass spectrometry. In a urine sample supplemented with quantitative ketamine, norketamine, MDMA and MDA control. The solution was adjusted pH 11, added solid Na2CO3, heated and stirred at 60 °C. Then, the sample was extracted by SPME with 60 μm polydimethylsiloxane-vinylbenzene copolymer(PDMS/DVB ), a middle-polar coated fiber for 15 minutes and then analyzed by HPLC-MS. The result showed good linearity in the range of 0. 03-1. 0 μg/mL, r≥0. 999 2, and LOD was 0. 01 μg/mL, the value of the average recovery rate was varying from 97. 19%-105. 44%, and RSD was within 10%. The method is simple, safe and accurate, and can be used to determine ketamine, MDMA and their main metabolites in urine.
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