摘要
利用微波消解技术消化样品,在盐酸介质中,硒（IV）可氧化I-生成I3-,进而与结晶紫形成离子缔合物。硒-碘化钾-结晶紫-聚乙烯醇缔合物在565 nm时符合朗伯-比尔定律。分别测定了中国西昌红牛夕、依木锁石、毒清药三种主要彝药中的硒含量。试验证明：三种彝药中均含有丰富的微量元素硒,红牛夕、依木锁石、毒清药三种彝药中硒含量分别为77.9、22.1、392.3μg/g,加标回收率为97.8%~103.3%,方法的相对标准偏差RSD不大于0.42%。用微波消解技术消化样品,消解时间短、操作简单、节省试剂、减少环境污染。试验结果真实可靠,适用于一般科学研究。
The samples were digested by microwave digestion technology. In hydrochloric acid medium, Se（IV） can oxidize I into I3 and form an ion-association complex with crystal violet（CV）. The absorbance of Se-KI-CV-PVA association complex follows Lambert-Beer Law at 565 nm. Using the above method, the content of Se in the three primary Yi medicines： Hongniuxi, Yimu Suoshi and Duqingyao which were produced in Xichang city of China, were measured. It was found that the three Yi medicines tested all contained trace amounts of Se which were 77.9, 22.1 and 392.3 μg/g for Hongniuxi, Yimu Suoshi and Duqingyao, respectively. And the recovery of standard addition is 97.8%-103.3%. The RSD is less than 0.42%. The benefit of using microwave digestion technique to digest samples include short processing time, simple operation, reduction of solvent usage and alleviation of environmental pollution. This method is reliable and thus applicable for general scientific research.
出处
《中国无机分析化学》
CAS
2011年第3期62-65,共4页
Chinese Journal of Inorganic Analytical Chemistry
基金
四川省教育厅自然科学研究项目(08ZC016)
西昌学院自然科学研究课题项目(ZZSSA0809)
关键词
微波消解
分光光度法
彝药
硒
microwave digestion
spectrophotometry
determination
Yi medicine
Se
