氢化物发生-原子荧光光谱法测定钢铁及合金中痕量砷和铋(英文)  

Determination of trace arsenic and bismuth content in iron,steel and alloys by hydride generation-atomic fluorescence spectrometric method

作　　者：王明海[1] 

机构地区：[1]钢铁研究总院,北京100081

出　　处：《冶金分析》2006年第5期33-37,共5页Metallurgical Analysis

摘　　要：本文采用氢化物发生-原子荧光光谱法测定钢铁及合金中痕量砷和铋。研究了原子荧光光谱仪最佳操作条件、酸度的影响、共存干扰离子限量以及还原剂的浓度。通过加入硫代氨基脲-抗坏血酸和磷酸能够有效地抑制基体元素的干扰。方法检出限分别为:砷0.04μg/g,铋0.02μg/g(3σ,n=11)。本方法用于测定低合金钢、铁镍基高温合金、镍基高温合金、钴基高温合金以及铜合金中痕量的砷和铋,结果满意。试验表明,该方法具有灵敏度高、准确性好、快捷、方便等优点。An analysis method for determining trace arsenic and bismuth in iron, steel and alloys by hydride generation-atomic fluorescence spectrometry （HG-AFS） is presented. The operation parameters of AFS, effects of acidity, limit of coexisting ions and concentration of reducing agent have been tested. Thiosemicarbazide-ascorbic acid and phosphoric acid were used to eliminate the interference of matrix elements. The detection limits of arsenic and bismuth are 0.04 μg/g and 0.02μg/g（3σ, n = 11）, respectively. The method has been applied to determine trace arsenic and bismuth in middle and low alloy steel, ferronickel-base superalloy, nickel-base superalloy, cobalt-base superalloy and copper alloy with satisfactory results. The method was proved to be sensitive, accurate, quick and convenient.

关 键 词：氢化物 原子荧光光谱 钢铁及合金 砷 铋 

分 类 号：O657.31[理学—分析化学]