甲醛处理后人脊髓中的利多卡因和布比卡因的同时测定

目的建立经甲醛防腐处理后人脊髓中利多卡因和布比卡因同时定量测定的HPLC分析法,以满足法医学鉴定的需要。方法以空白人脊髓经甲醛防腐处理后添加标准利多卡因和布比卡因,对样品的前处理方法及仪器测试条件、方法的线性范围、检测限、精密度、回收率进行系统考察。结果所建方法中两药物的线性范围为0.5～10.0ug.g-1(利多卡因r=0.9999;Bupivacaine r=0.9998),检测限利多卡因为15ng布比卡因为20ng,日内、日间分析的相对标准偏差均在4.3％以内,加样回收率在97.3％～100.3％之间。结论经甲醛防腐处理后的脊髓可同时进行利多卡因和布比卡因定量测定。所建方法准确、实用,适用于法医学鉴定及相关研究。

Simultaneous determination of lidocaine and bupivacaine in human spinal cord pretreated with formaldehyde by high performance liquid chromatography

Objective For purpose of meeting the requirement of forensic toxicological investigation, a RPHPLC method was established for simultaneous determining lidocaine and bupivacaine in human spinal cord pretreated with formaldehyde. Method Analytical column was YWG-C18 (4.6mm×150mm) and a per column. Mobile phase was CH3OH:0.015M NaH2PO4 =75:25 (v/v) pH = 7.2. The wavelength of detection was 210 nm. The pretreatment method of sample, detection condition, linear range, precision and recorery of the method were systematically investigated by using blank spinal cord spiked with standard lidocaine and bupivacaine. Results The linear range was 0.5 ~ 10.0μg.g-1 (lidocaine: r=0.9999; bupivacaine: r = 0.9998). The detection limit of lidocaine was 15ng and of bupivacaine 20ng (S/N≥3). The intra and inter day precision of assay of lidocaine and bupivacaine were less than 4.3% (n=5). Both lidocaine and bupivacaine have been detected in a forensic toxicological analysis case by using this method and the result was correct. Conclusion Lidocaine and bupivacaine can determined in human spinal cord pretreat-edwith formaldehyde by HPLC. The method is simple, useful and accurate. It can be applied in the forensic toxicological analysis investigation and other medical studies.