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《化学分析计量》 2020年第05期
DOI:10.3969/j.issn.1008-6145.2020.05.017
高效液相色谱-电感耦合等离子体质谱法同步测定海水中的无机砷与六价铬
黄键,张文国,施锦辉,曹海峰,王红卫,葛红梅,王金娟
南通海关综合技术中心,江苏南通 226004 
Simultaneous analysis of inorganic arsenics and chromium(Ⅵ) in sea water by high performance liquid chromatography-inductively coupled plasma mass spectrometry
HUANG Jian, ZHANG Wenguo, SHI Jinhui, CAO Haifeng, WANG Hongwei, GE Hongmei, WANG Jinjuan
Nantong Customs Comprehensive Technology Center, Nantong 226004, China 
摘要:建立高效液相色谱-电感耦合等离子体质谱法同步分离和测定海水中亚砷酸盐[As(Ⅲ)]、砷酸盐[As(Ⅴ)]和六价铬[Cr(Ⅵ)]的分析方法。海水样品直接进样,以40 mmol/L pH 9的硝酸铵溶液作为流动相,使用Hamilton PRP-X100阴离子交换色谱柱对待测组分进行分离,实现了亚砷酸根、砷酸根和六价铬3种元素形态的分离与测定。3种元素形态的线性范围分别为:As(Ⅲ),As(Ⅴ) 10~250 μg/L;Cr(Ⅵ) 20~500 μg/L。检出限分别为3,3,6 μg/L,加标回收率为85.1%~95.4%,相对标准偏差为1.0%~3.8%(n=6)。该方法操作简便,可同步测定海水中砷和铬的元素形态。 
Abstract:A method for the simultaneous separation and determination of three species of As(Ⅲ), As(Ⅴ) and Cr(Ⅵ) in sea water was established by high performance liquid chromatography-inductively coupled plasma mass spectrometry. 40 mmol/L NH4NO3 solution was used as the mobile phase which was adjusted to pH 9, sea water samples were directly injected then separated by Hamilton PRP-X100 anion exchange chromatography. The three element species including As(Ⅲ), As(Ⅴ), Cr(Ⅵ) were successfully separated by the developed method. The three analytes showed good linearity in certain concentration range[As(Ⅲ)/As(Ⅴ): 10-250 μg/L; Cr(Ⅵ): 20-500 μg/L]. The detection limits (LODs) of the three analytes were 3, 3, 6 μg/L, respectively. The recoveries for the analytes were between 85.1% and 95.4% while the relative standard deviations were 1.0%-3.8%(n=6). This method is simple, and it provide a useful tool for the speciation analysis of arsenic and chrome in sea water. 
关键词:砷;铬;元素形态;高效液相色谱-电感耦合等离子体质谱法;海水 
Keywords:arsenic; chromium; elemental species; high performance liquid chromatography-inductively coupled plasma mass spectrometry; sea water 
本文引用格式:
黄键,张文国,施锦辉,等.高效液相色谱-电感耦合等离子体质谱法同步测定海水中的无机砷与六价铬[J].化学分析计量,2020,29(5):72-75. 

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