分析化学2011，Vol.39Issue(4)：491-495,5.DOI:10.3724/SP.J.1096.2011.00491
磷酸超声提取大气颗粒物中砷的多种形态
Ultrasonic Extraction of Arsenic Speciation in Atmospheric Particles with Phosphoric Acid
摘要
Abstract
With phosphoric acid as the extractant, arsenic species in atmospheric particles, including As(Ⅲ), As (Ｖ), monomethylarsonic acid (MMA) and dimethylarsinic acid (DMA), were gently extracted and detected by high performance liquid chromatography conjugated hydride generation atomic fluorescence technique (HPLC-HG-AFS). The original arsenic species contents and the spiking species of the standard material (GBW 08302) were determined to seek the best extraction method. Under the optimized chromatographic and spectrographic conditions, the arsenic species were baseline separated, with the RSDs＜2％ (n=5). The method detection limits of As(Ⅲ), As(Ｖ), MMA and DMA were 1.45, 1.26, 1.97 and 1.16 μg/L, respectively. After ultrasonic extraction 40 min with 1 mol/L phosphoric acid, the extraction efficiency of arsenic species in the spiked standard material achieved 90％ without speciation transformation. The developed method was applied to the determination of arsenic species concentration in the atmospheric particles. The results showed that the main arsenic species in one place of Beijing were As(Ⅲ) and As(Ｖ).关键词
氢化物发生原子荧光光谱/高效液相色谱/大气颗粒物/砷/形态分析Key words
Hydride generation atomic fluorescence spectrometry/ High performance liquid chromatography/ Atmospheric particles/ Arsenic/ Speciation analysis引用本文复制引用
贺婷婷,李柏,徐殿斗,杨孝智,马玲玲,王华建,王延飞..磷酸超声提取大气颗粒物中砷的多种形态[J].分析化学,2011,39(4):491-495,5.基金项目
本文系国家自然科学基金项目(No.10505023),中国科学院知识创新工程重要方向性项目(No.KJCX3.SYW.N3)及国家科技支撑计划重点项目(No.2007BAC27B00)资助 （No.10505023）
