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253.7nm,负高压410V,载气流量1.5L/min,屏蔽气流量0.1L/min,进样量0.5L/min,样品还原时间40s。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。
Objective To study the trace mercury in Alisma orientalis (Sam) Juzepcz and Baphi- cacanthus Chsia (Nees) Brernek produced in Fujian province. Methods The cold atomic fluorescence spectrometry with HNO3-HF-H2O2 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.
出处
《福建医科大学学报》
2007年第1期81-84,共4页
Journal of Fujian Medical University
基金
福建省自然科学基金资助项目(C0540019)
关键词
泽泻
板蓝根
汞
微波消解
冷原子荧光法
微波
福建
Alisma orientale
radix isatidis
mercury
cold atomic fluorecence spectrometry
microwaves
Fujian