流动注射-火焰原子吸收法测定天然水体中的铬(Ⅲ)和铬(Ⅵ)  

DETERMINATION OF Cr(Ⅲ) AND Cr(Ⅵ) IN NATURAL WATER BY FLOW INJECTION-FAAS

作　　者：高焰[1] 冷家峰[1] 孔庆珍[1] 张怀成[1] 李建议[1] 

机构地区：[1]济南市环境保护科学研究所,济南250014

出　　处：《化学分析计量》2003年第3期27-28,32,共3页Chemical Analysis And Meterage

摘　　要：采用流动注射-火焰原子吸收法测定天然水体中的微量铬(Ⅲ)和铬(Ⅵ)。用整合树脂在线富集浓缩样品中的铬(Ⅲ),结合流动注射技术,将洗脱液直接导入火焰原子吸收分光光度仪中进行测定。加入盐酸羟胺使水体中的铬(Ⅵ)转化成铬(Ⅲ),然后间接测定。时在线富集测试条件、干扰物质的影响等进行了探讨。该方法检出限为0.84μg/mL,加标回收率为94.4％～103％。Trace Cr(Ⅲ) and Cr(Ⅵ) in natural water were determined by flow injection-FAAS. Cr(Ⅲ in sample enriched by using chelate resin was determined when the washing liquid being led to FAAS. Cr( Ⅵ) was determined indirectly when it was changed into Cr(Ⅲ)by adding hydroxylamine hydrochloride. On-line determination conditions and the influence of the interference factors were discussed. The detecting limit is 0. 84μg/mL and the recovery is 94. 4% ~ 103% .

关 键 词：流动注射 火焰原子吸收法 测定 天然水体 铬(Ⅲ) 铬(Ⅵ) 环境监测 

分 类 号：X832[环境科学与工程—环境工程]