摘要
采用氢化物发生-原子荧光光谱法同时测定饮用水中砷和锑。在盐酸(1+9)溶液中,加入硼氢化钾溶液作还原剂,使其与溶液中砷(Ⅲ)及锑(Ⅲ)离子反应生成氢化物。分析中采用载气及屏蔽气的流量依次为400mL·min^(-1)及800mL·min^(-1)。试样溶液中加入硫脲及抗坏血酸混合溶液作为预还原剂,于仪器中引入1.0mL试样溶液,按所选定的工作条件操作。砷及锑的质量浓度均在10.0μg·L^(-1)以内与其对应的荧光强度呈线性关系,砷和锑的检出限(3S/N)依次为0.087μg·L^(-1)和0.048μg·L^(-1)。应用此法对饮用水进行分析,测得砷和锑的回收率分别在90.5%～93.3%和92.5%～95.3%之间。
HG-AFS was applied to the simultaneous determinations of arsenic and antimony in drinking water.Hydrides of As（Ⅲ） and Sb（Ⅲ） were generated from HCl（1＋9） solution by reacting with KBH_4 solution as reductant.Flow-rates of 400 mL·min^（-1） for carrier gas and 800 mL·min^（-1） for shielding gas were taken in the analysis.Mixed solution of thiourea and ascorbic acid was added to the water sample as pre-reductant.One mL of sample solution was introduced and operated under the prescribed working condition of the instrument.Linear relationships between the fluorescence intensity and mass concentration of As and Sb were found same in the range within 10.0μg·L^（-1）,with detection limits（3S/N） of 0.087μg·L^（-1） and 0.048μg·L^（-1）,respectively.The proposed method was applied to the analysis of sample of drinking water,giving values of recovery found were 90.5%-93.3%for As and 92.5%-95.3%for Sb.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2010年第12期1431-1432,1435,共3页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
江苏省高校自然科学基金项目(08KJD330002)
关键词
氢化物发生
原子荧光光谱法
饮用水
砷
锑
Hydride generation
Atomic fluorescence spectrometry
Drinking water
Arsenic
Antimony
