摘要
本文报道了氢化物无色散原子荧光法测定水中痕量Sb(Ⅲ)和Sb(Ⅴ),方法简便、快速、灵敏。在pH4.8～5.2时,Sb(Ⅲ)与KBH_4作用生成气态氢化物(SbH_3),而Sb(Ⅴ)在此酸度下不与KBH_4作用;另取水样在2mol/L HCl溶液中,用硫脲和抗坏血酸还原Sb(Ⅴ)为Sb(Ⅲ),测定总量锑,差减法得Sb(Ⅴ)。方法检出限0.1ng/ml,相对标准偏差2.7～7.9%(n=11),回收率95～109%。
A simple, rapid and sensitive hydride generation nondispersive atomic fluorescence spectrometry method has been developed for the determination of trace Sb (Ⅲ) and Sb (Ⅴ) in water. An aliquot portion of the sample, adjusted to an acidity of pH4.8—5.2, is treated with KBH_4, only Sb (Ⅲ) forms a gaseous hydride (SbH_3). The SbH_3 was determined directly by AFS, Sb(Ⅴ) was not formed SbH_3 under the same condition. Another aliquot portion of the sample, reduced Sb (Ⅴ) with thiourea and ascorbic acid into Sb (Ⅲ) in 2mol/L HCl, then the total contents of Sb was determined by the same method. The content of Sb (Ⅴ) is obtained by their difference. The detection limit of this method was 0.1ng/ml. R. S. D. was 2.7—7.9% (n=11), and the recoveries was 95—109%.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
1992年第2期87-91,共5页
Spectroscopy and Spectral Analysis
关键词
氢化物
锑
污水
原子荧光法
Hydride generation nondispersive AFS, Antimony (Ⅴ), Antimony (Ⅲ)
