超声波消解-氢化物原子荧光光谱法测定聚合硫酸铁中砷  

Determination for arsenic in poly ferric sulfate by ultrasonic digestion-hydride generation atomic fluorescence spectrometry

作　　者：李宗泽 他德洪 苏海涛 孔涛 李少华 高嵩 董莹 Li Zongze Ta Dehong Su Haitao Kong Tao Li Shaohua Gao Song Dong Ying(Yunnan Institute of Products Quality Supervision and Inspection, Kunming 650223, China Yunan Province Qujing Quality and Technical Supervision Comprehensive Inspection Center)

机构地区：[1]云南省产品质量监督检验研究院,云南昆明650223 [2]云南省曲靖市质量技术监督综合检测中心

出　　处：《无机盐工业》2017年第3期58-60,共3页Inorganic Chemicals Industry

基　　金：国家质量监督检验检疫总局科技计划项目(2015QK199)

摘　　要：建立了氢化物原子荧光光谱法测定水处理剂聚合硫酸铁中微量砷的方法。在对比3种不同前处理方法基础上选择优化方法,即采用少量硝酸超声波直接消解样品,并优化了前处理消解条件。砷的方法检出限为0.002 mg/kg。在最佳条件下对18个聚合硫酸铁样品进行砷含量测定,砷含量均在0.15~0.45 mg/kg范围内,加标回收率为98.2%~109.4%。A method for the determination of trace amount of arsenic（As） in a water treatment chemical,poly ferric sulfate,by hydride generation atomic fluorescence spectrometry,was established.Based on the analysis results and comparisons of three different pretreatment methods,the sample was treated directly by HNO3-ultrasonic digestion and the digestion conditions were optimized.The detection limit for As was 0.002 mg/kg.Under the optimized conditions,the method was applied for analysis of 18 poly ferric sulfate samples,and the concentrations of As were all in the range of 0.15~0.45 mg/kg with the recoveries between 98.2%~109.4%.

关 键 词：原子荧光光谱法 超声波消解 聚合硫酸铁 砷 

分 类 号：TQ126.4[化学工程—无机化工]