血汞的微波消解－原子荧光测定法

目的探讨用微波消解-原子荧光光谱法测定血汞。方法血样用高压微波消解后，在酸性介质中汞离子被硼氢化钾还原生成游离汞原子，由氩气带入石英原子化器中，经汞空心阴极灯的激发产生原子荧光，其荧光强度与样品中的汞浓度成正比。结果加标回收率为93．2％-109．5％，方法相对标准偏差（RSD）为3．3％-5．3％，最低检出限为0．046μg／L。结论该法具有操作简便、灵敏度高、检出限低、方法重现性好、线性范围宽的优点，适合职业人群血汞的检测分析。

Determination of Blood Mercury with Microwave Decomposition Atomic Fluorescence Spectrometry

[ Objective] To develop a method for the determination of blood mercury with microwave decomposition atomic fluorescence spectrometry. [ Methods] After the samples were decomposed by high pressure microwave, the mercury ion in the acidity medium was reduced by KBH4 into a freedom mercury atom, which was taken by argon into the quartz atomizer and excitated by mercury hollow cathode lamp to create atom fluorescence, the fluorescence strength was positively correlated with the mercury concentration in the sample. [Results]The labeled recovery rate was 93.2% - 109.5% ; the relative standard deviation （RSD） was 3.3% - 5.3% ; detection limit was 0. 046μg/L. [Conclusion] This method is simple, sensitive with low detection limit, good reproducibility and wide linear range; it is applicable for the detection and analysis of blood mercury among relevant professionals.