干松茸中汞的微波消解-原子荧光光谱测定法  

Determiation of Mercury in Dry Matsutake

作　　者：陈素军[1] 

机构地区：[1]北京市丰台区疾病预防控制中心理化科,100071

出　　处：《职业与健康》2011年第10期1113-1114,共2页Occupation and Health

摘　　要：目的建立一种快速准确灵敏的微波消解-原子荧光光谱法,用于测定干松茸中汞含量。方法采用硝酸微波消解体系对样品进行前处理,氢化物-原子荧光光谱法测定样品中汞,同时优化仪器的工作条件。结果在选定条件下,还原剂硼氢化钾（KBH4）浓度为10 g/L;灯电流20 mA;载气流量400 m l/m in;酸性介质为2%的盐酸;汞浓度在0.300-10.00μg/L时,方法的线性关系好。相关系数r=0.999 4,检出限为0.025μg/L,加标回收率91.3%-97.1%,相对标准偏差（RSD）1.34%-2.89%。结论该方法灵敏,耗时少,准确度高,适用于干松茸中汞含量的测定。[Objective]To establish a fast,accurate and sensitive method for determination of mercury in dry matsutake by microwave digestion-atomic fluorescence spectrometry.[Methods]Nitric acid microwave digestion system was used for samples pretreatment,hydride-atomic fluorescence spectrometry was applied for mercury determination,optimizing the working conditions of the instrument.[Results]Under the selected conditions,reductant potassium borohydride（KBH4） concentration was 10 μg/L,lamp current was 20 mA;the carrier flow was 400 ml/min,acid medium for 2% of hydrochloric acid,mercury concentrations ranged from 0.300~10.00 μg/L,with good linear relationship.Correlation coefficient r=0.999 4,detection limit was 0.025 μg/L.The recovery was 91.3%~97.1%,relative standard deviation（RSD） =1.34%~2.89%.[Conclusion]This method is sensitive and accurate,with less time-consuming,and suitable for mercury determination in dry matsutake.

关 键 词：微波消解 原子荧光光谱法 汞 干松茸 

分 类 号：R115[医药卫生—公共卫生与预防医学]