ICP-MS法测定人尿样中15种微量稀土元素含量

Urine samples were collected in the morning and were stored frozen at −20 ℃ until analysed. The samples were wet digested by HNO₃＋HCLO₄ before determination. The solution was directly analyzed by ICP-MS for the determination of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu in human urine with rhenium internal standard calibration. The detection limits were 0.1-2.1 ng•L^－1. Certified reference material of human hair GBW 09101a was analyzed by the described method. The analytical values of the certified reference material showed closed agreement with the reference values.     

液相色谱-串联质谱法确证人尿中的利他林及其主要代谢物

建立了固相萃取-液相色谱-串联质谱法同时确证人尿中的利他林及其主要代谢物利他林酸的方法。尿样中的药物经反相C₁₈固相萃取柱净化、氮气吹至干,以甲睾为内标,用流动相溶解后进行液相色谱-串联质谱法测定。该方法的最低检出限为5 μg•L^-1;利他林和利他林酸的回收率分别为80.6%和68.4%;批内和批间的相对标准偏差小于6.0%,能满足国际反兴奋剂机构(WADA)对其最低检测能力500 μg•L^-1的要求。