毛细管电泳-间接化学发光法检测尿液与血液中吗啡含量

摘要

在碱性溶液中,吗啡对Ag(Ⅲ)配合物-鲁米诺化学发光体系的化学发光信号有显著抑制作用,且抑制程度与吗啡浓度成正比.基于此,建立了毛细管电泳-间接化学发光检测尿液和血液中吗啡含量的方法.在优化条件下,方法检出限为0.75 mg/L,线性范围为2.0～30.0 mg/L,相关系数(r)为0.9998;对20mg/L的吗啡进行7次平行测定,测得的相对标准偏差(RSD)为2.0％.结合固相萃取法,该方法成功用于尿液和血液中吗啡含量的测定,平均加标回收率分别为109.0％与101.3％.该方法分辨率高、灵敏、分析成本低,可用于尿液和血液中吗啡含量的测定.%Based on the fact that morphine has a significant inhibitory effect on Ag (Ⅲ) complex luminol chemiluminescence system in alkaline solution and the effect is proportional to the concentration of morphine,a novel method was established for the determination of morphine by capillary electrophoresis coupled with indirect chemiluminescence detection.Under the optimized conditions,there was a linear range of 2.0-30.0 mg/L for morphine with a correlation coefficient(r) of 0.999 8 and the detection limit of 0.75 mg/L.The RSD(n =7) was 2.0％ for morphine in a concentration of 20 mg/L.Combined with solid phase extraction,the method was successfully applied in the detection of morphine in urine and blood samples with the average recoveries of 109.0％ and 101.3％,respectively.With the advantages of high-resolution,sensitivity and low-cost,the method could be used for the determination of morphine in urine and blood samples.