氢化物发生-原子荧光光谱法测定低合金钢中微量砷  

HG-AFS Determination of Trace Amount of Arsenic in Low Alloy Steels

作　　者：陈忠颖[1] 朱文中[1] 

机构地区：[1]上海材料研究所检测中心,上海200437

出　　处：《理化检验（化学分册）》2011年第7期771-773,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：采用氢化物发生-原子荧光光谱法测定低合金钢中砷的含量。样品经盐酸-硝酸混合酸消解,以盐酸(5+95)溶液为反应介质,15g·L^(-1)硼氢化钾-2g·L^(-1)氢氧化钾的混合溶液为还原剂,采用柠檬酸作为掩蔽剂。砷的质量浓度在60.0μg·L^(-1)以内与荧光强度呈线性关系,方法的检出限(3s/k)为0.023μg·L^(-1)。应用此法对标准钢样进行了分析,测定结果与认定值相符合,可满足钢铁中微量砷(质量分数0.001%～0.04%)的测定要求。HG-AFS was applied to the determination of arsenic in low alloy steels.Sample was digested with mixed acid of HCl and HNO_3,and determined in a medium of HCl（5 ＋ 95） solution using the mixed solution of 15 g·L^（-1） KBH_4 and 2 g·L^（-1） KOH as reducing reagent and citric acid as masking reagent.Linear relationship between values of fluorescence intensity and mass concentration of As was found in the range within 60.0μg·L^（-1）, with detection limit（3s/k） of 0.023μg·L^（-1）.The proposed method was applied to the analysis of 2 steel CRM＇s, giving results in consistency with the standard values.This method was found to be feasible for the determination of trace amount of arsenic（w=0.001%～0.04%） in steel.

关 键 词：氢化物发生-原子荧光光谱法 低合金钢 砷 

分 类 号：O657.31[理学—分析化学]