流动注射氢化物发生-原子吸收光谱法测定钢铁中的砷、锑

Determination of Arsenic and Stibium in Steel by FI-HG-AAS

研究了流动注射氢化物发生-原子吸收光谱法测定钢铁中砷、锑试验方法,即仪器工作条件、还原剂的选择、酸度、硼氢化钾浓度、共存离子的影响等条件试验。本方法测定的线性范围:砷:0.05-100μg·L^(-1),回归方程为:C_(As)=0.047A-0.003,相关系数r=0.9996,检出限L_(D(As))=0.03μg·L^(-1),RSD_(As)=1.12%;锑:0.05-100μg·L^(-1),回归方程为:D_(Sb)=0.0094A-0.0003,相关系数r=0.9996,检出限L_(D(sb))=0.03μg·L^(-1),RSD(Sb)=1.06%。该方法灵敏度高,测定结果准确可靠、操作方便快速,能满足钢铁中测定砷、锑的要求。

In this paper,the arsenic and stibium in steel were determined by FI-HG-AAS. The operating conditions such as apparatus,reducing agent,acidity,concentration of KBH4,the influence of coexistent ion were optimalized. Linear relationship was obtained in the range of 0.05 to 100μg/L for arsenic with the linear regression equation of CAs= 0. 047A--0. 003,correlation coefficient of 0. 9996, detection limit of 0. 03μg·L^-1 ;and RSD of 1.12% for arsenic. The Linear relationship in the range of 0. 05 to 100μg/L for stibium with the linear regression equation of CSb = 0. 0094A--0. 0003, correlation coefficient of 0. 9996,detection limit of 0.03μg·L^-1 ,and RSD of 1.06% for stibium. This method is sensitive, accurate and credible, convenient, fast, and can meet the needs of the determination of Arsenic and stibium in steel.