微波消解冷原子荧光分析法测定泽泻和南板蓝根的痕量汞
泽泻;,板蓝根;,汞;,微波消解;,冷原子荧光法；,微波;,福建,,泽泻;,板蓝根;,汞;,微波消解;,冷原子荧光法；,微波;,福建,1材料与方法,2结果,3讨论,参考文献：
摘要: 目的 建立泽泻、南板蓝根中痕量汞的测定方法。对样品的前处理方法和仪器工作条件进行探讨和优化。方法 采用硝酸氢氟酸过氧化氢体系微波消解冷原子荧光法测定闽产中药建泽泻、南板蓝根中痕量汞。结果 平均回收率95.6%~104.8%,精密度<3.5%。仪器工作参数:测定波长253.7 nm,负高压410 V,载气流量1.5 L/min,屏蔽气流量0.1 L/min,进样量0.5 L/min,样品还原时间40 s。结论 建立的微波消解冷原子荧光法方便、快捷、准确,可用于南板蓝根、泽泻中痕量汞测定。关键词: 泽泻; 板蓝根; 汞; 微波消解; 冷原子荧光法； 微波; 福建
Determination of Trace Mercury in Alisma orientalis(Sam) Juzepcz and Baphicacanthus Chsia(Nees) Bremek by Microwave Digestion and Cold Atomic Fluorescence Spectrometry
Hu Juan, Cheng Yonghua, Lai Yuanfa
Division of Pharmacologicalogy, Fujian University of Traditional Chinese Medicine, Fuzhou 350108, China
ABSTRACT: Objective To study the trace mercury in Alisma orientalis(Sam) Juzepcz and Baphicacanthus Chsia(Nees) Bremek produced in Fujian province. Methods The cold atomic fluorescence spectrometry with HNO3HFH2O2 microwave digestion was used.The pretreatment sample and the experimental conditions comprised selectcon of digestion reagent, microwave digestion, machine work conditions:determination wavelength 253.7 nm, negative high pressure 410 V, carrier gas flow rate 1.5 L/min, sample volume 0.5 L/min, sample reduction time 40 s. Results The recovery ratio was 95.6%~104.8%, standard deviation rate(RSD) was smaller than 3.5%. Conclusion This method is proved to be efficient. ......
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