氢化物发生-原子荧光光谱法测定水中总砷
吴旸,赵娇娇,王婷,郭萌萌,薛林
(山东省济南生态环境监测中心,济南 250014)
Determination of total arsenic in water by hydride generation-atomic fluorescence spectrometry
吴旸,赵娇娇,王婷,郭萌萌,薛林
Jinan Eco-environmental Monitoring Center of Shandong Province, Jinan 250014, China
摘要:建立氢化物发生-原子荧光光谱法测定水中总砷含量的方法。以王水溶液(1+1)为消解体系,采用沸水
浴进行消解,加入硫脲-抗坏血酸溶液对消解液进行预还原,在选定的仪器工作条件下,对砷灯预热30 min 后进行
测定。总砷的质量浓度在0~10.0 μg/L 范围内与荧光强度具有良好的线性关系,相关系数为0.999 9,检出限为0.1
μg/L。利用该方法对地表水和污水中的总砷进行测定,测定结果的相对标准偏差均小于4%(n=7),样品加标回收
率为95%~105%,对有证标准样品(GSB 07-3171-2014)进行测定,测定值均在标准值不确定度范围内。该方法可用
于水中总砷的测定。
Abstract:A method for the determination of total arsenic in water by hydride generation-atomic fluorescence
spectrometry was established. Taked aqua regia solution(1+1) as the digestion system, the sample was digested with
boiling water bath, tthe hiourea-ascorbic acid solution was added to digestion solution for pre-reduction, under the selected
instrument working conditions, the total arsenic was determined after the arsenic lamp was preheated for 30 min. In
the range of 0-10.0 μg/L, the mass concentration of total arsenic had a good linear relationship with the fluorescence
intensity, the correlation coefficient was 0.999 9, and the detection limit was 0.1 μg/L. The total arsenic in surface water
and sewage was determined by this method, the relative standard deviations of determination results were all less than
4%(n=7). and the recoveries of standard addition were 95%-105%. Measured the certified standard samples(GSB 07-
3171-2014) by this methed, the measured values were all within the uncertainty range of the standard value. The method is
suitable for the determination of total arsenic in water.
关键词:总砷;水浴消解;原子荧光光谱法
Keywords:total arsenic; water bath digestion; atomic fluorescence spectrometry
本文引用格式:
吴旸,赵娇娇,王婷,等. 氢化物发生- 原子荧光光谱法测定水中总砷[J]. 化学分析计量,2021,30(10):46.
Wu Yang,Zhao Jiaojiao,Wang Ting,et al. Determination of total arsenic in water by hydride generation-atomic fluorescence spectrometry[J]. Chemical Analysis and Meterage,2021,30(10):46.
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