氢化物发生-原子荧光光谱法测定水中总砷  

Determination of total arsenic in water by hydride generation-atomic fluorescence spectrometry

作　　者：吴旸 赵娇娇 王婷 郭萌萌 薛林 Wu Yang;Zhao Jiaojiao;Wang Ting;Guo Mengmeng;Xue Lin(Jinan Eco-environmental Monitoring Center of Shandong Province,Jinan 250014,China)

机构地区：[1]山东省济南生态环境监测中心,济南250014

出　　处：《化学分析计量》2021年第10期46-49,共4页Chemical Analysis And Meterage

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0~10.0μg/L范围内与荧光强度具有良好的线性关系,相关系数为0.9999,检出限为0.1μg/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。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 0-10.0μg/L,the mass concentration of total arsenic had a good linear relationship with the fluorescence intensity,the correlation coefficient was 0.9999,and the detection limit was 0.1μg/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 

分 类 号：O657.3[理学—分析化学]