Continuous Coprecipitantion Preconcentration-Hydride Generation for Arsenic in Inductively Coupled Plasma-Atomic Emission Spectrometry

Journal of the Korean Chemical Society

Chang-Gyu Kim¹  Yongnam Pak¹ 

关键词: Arsenic;    Hydride Generation;    Continuous Preconcentration-HG;    ICP;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

In a stream of aqueous sample, trace arsenic ions were quantitatively coprecipitated and detected in ICP-AES through hydride generation. In was used as a coprecipitating reagent. The precipitate was collected on a filter and dissolved by HCl. The eluted As was sent into the reaction coil to generate hydrides and analyzed by ICP. With optimal conditions, and with a sample of 0.3 mL, an enrichment of 70 was obtained with the sampling speed of 10/hr. When compared with coprecipitation and hydride generation technique, the sensitivity was increased by 7 and 10 times, respectively. The limit of detection limit(3s) was 0.020 mg L-1 and the precision was 7-10%. Separation of As3+ and As5+ were possible using citric acid in hydride generation.

【 授权许可】

Unknown