摘要
铝锭或铝合金样品用盐酸-硝酸(3+1)溶解,氢化物发生-原子荧光光谱法同时测定砷和汞的含量。对负高压和灯电流、载气流量、屏蔽气流量、铝基体光谱、溶液酸度、硼氢化钠浓度等影响砷、汞测定因素进行了试验并予以优化。砷、汞的检出限(3S/N)分别为0.055,0.006 2 mg·L^(-1),相对标准偏差(n=6)均小于2.5%。应用此法分析了铝锭和铝合金实际样品,砷、汞加标回收率分别在93.3%～103.3%和93.3%～106.7%之间。
The sample of aluminum ingot or alloy was dissolved with HCl-HNO3 （3＋1）, and the contents of arsenic and mercury were determined by HG-AFS. Influential factors, including negative high-voltage, lamp current, the rates of carrier and shield gases, matrix spectrum of aluminium, pH of solution, and concentration of NaBH4 were studied and optimized. The detection limits （3S/N） of arsenic and mercury found were 0. 055 and 0. 006 2 mg·L-1, and values of RSD＇s （n=6） were less than 2. 5%. The proposed method was applied to the analysis of samples of aluminium ingots and aluminiurn alloys, and recovery was tested by standard addition method, giving results in the range of 93. 3%-103. 3 for arsenic and 93. 3%-106. 7% for mercury.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2009年第10期1197-1199,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
氢化物发生-原子荧光光谱法
铝锭
铝合金
砷
汞
Hydride generation-atomic fluorescence spectrometry
Aluminium ingot
Aluminium alloy
Arsenic
Mercury
