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本文提出了一种测定铭铂(抗癌药)中微量钡和银的方法。样品用0.016mol/lHNO_3进行溶解后,按照所选的最佳试验条件应用涂钨热解石墨管——石墨炉原子吸收法测定钡,避免了钡的碳化物形成,提高了方法的灵敏度。分析结果证实,其特征量为4.1pg/1％吸收,检出限22.14pg,加标回收率94.3％～101.5％,相对标准偏差小于14.8％。用普通石墨管测定银,其特征量为7.8pg/1％吸收,检出限1.6pg,加标回收率94.4％～96.7％,相对标准偏差小于6.63％。该法具有良好的精密度和准确度。
In this paper, a method for the determination of trace amounts of barium and silver in platinium (anticancer drug) was proposed. The samples were dissolved with 0.016 mol / l HNO3, then the barium was determined by graphite furnace atomic absorption spectrometry according to the best experimental conditions. The formation of barium carbide was avoided and the sensitivity of the method was improved. The results of the analysis confirmed that the detection limit was 4.1pg / 1%, the detection limit was 22.14pg, the recoveries were 94.3% ~ 101.5%, and the relative standard deviations were less than 14.8%. The silver was measured by ordinary graphite tube. The characteristic quantity was 7.8 pg / 1% of the absorption, the detection limit was 1.6 pg, the recovery was 94.4% ~ 96.7% and the relative standard deviation was less than 6.63%. The law has good precision and accuracy.