摘要
目的建立微波消解-冷汞发生器-原子吸收光谱法测定中药材中痕量汞的方法。方法用微波消解法对几种常用中药材样品进行前处理,用冷汞发生器-原子吸收光谱法测定其中的痕量汞。结果微波消解过程中,消解试剂选择硝酸+氢氟酸(8∶1)消化效果最佳,汞在浓度为0μg/L^50μg/L范围内线性关系良好,相关系数r=0.9999,方法检出限为0.025μg/L,测定汞30μg/L标准溶液相对标准偏差为1.78%,测定国家一级标准物质人发(GBW09101)相对标准偏差为3.35%,且测定结果与标准含量一致。结论该方法测定中药材中痕量汞安全环保,简单快速,准确灵敏,具有良好的应用前景。
Objective To establish a method for determination of trace mercury in Chinese herbal medcine by new cold mercury generation - atomic absorption spectrometry with microwave digestion. Methods After pretreatment by micro- wave digestion system, trace mercury in several common Chinese herbal medicine were determined by cold mercury gen- eration - atomic absorption spectrometry. Results When using the nitric acid ＋ hydrofluoric acid peroxide reagent at the ratio of 8：1 as acid digestion reagent in the digestion process,the samples will be completely digested wide linear rela- tionship was achieved in the range of 0μg/L-50μg/L with relative coefficient of 0. 9999 and the detection limit was 0. 025μg/g with RSD of 1.78% formercury at 30μg/L Trace mercury in the standard reference substance human hair （ GBW09101 ） was determined incording this way. The results were in good agreement with certified value and RSD was 3.35%. Conclusion Determination of trace mercury in Chinese herbal medicine has safe environmental protection,this method is simple, rapid, accurate, sensitive and has a good application prospect.
出处
《医药论坛杂志》
2014年第1期1-3,6,共4页
Journal of Medical Forum
基金
中华人民共和国科技部科技支撑计划课题(2006BAI21B07)
关键词
微波消解
冷汞发生器
原子吸收光普法
中药材
规范
痕量汞
Microwave digestion
Cold mercury generation
Atomic absorption spectrometry
Chinese herbal medicine
Specification
Trace mercury
