氢化物发生-原子吸收光谱法快速测定锌电解料液中痕量砷  

HG-FAAS DETERMINATION OF TRACES OF ARSENIC IN ZINC ELECTROLYTE

作　　者：张明浩[1] 周春山[1] 李志红 

机构地区：[1]中南工业大学化学化工学院,长沙410083

出　　处：《理化检验（化学分册）》2000年第11期483-484,487,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：在盐酸介质中 ,As( )用碘化钾和抗坏血酸还原成 As( )后 ,再与强还原剂硼氢化钾反应生成气态氢化砷。氢化砷用氮载气送入原子化系统原子化后进行测定。砷的最大吸收波长为1 93.7nm,在 0 .5～ 50 ng·ml-1范围内 ,砷浓度与吸光度呈线性关系 ,检出限为 3.4× 1 0 -9mol·L-1。方法毋需预处理直接用于锌电解料液中微量和痕量砷的测定 。It is reported that arsenic (Ⅲ or Ⅴ) can be determined in zinc electrolyte by HG FAAS method without pre treatment. The pentavalent arsenic is first reduced to trivalent by KI and ascorbic acid in HCl medium. The trivalent arsenic is then further reacted with KBH 4 to form AsH 3, which is led into the atomizer by using nitrogen as carrier, and finally determined by FAAS. The absorbance measurements are carried out at its absorption maxima 193.7nm. Linear relationship between arsenic concentration and absorbance is obtained in the range of 0.5~50ng of arsenic per ml. The detection limit is found to be 3.4×10 -9 mol·L -1 . Recoveries are found to be in the range of 95.3%~105%.

关 键 词：砷 锌电解料液 原子吸收光谱法 测定 湿法炼锌 

分 类 号：TF813.032[冶金工程—有色金属冶金] O613.63[理学—无机化学]