Speciation of arsenic(III) and arsenic(V) by inductively coupled plasma-atomic emission spectrometry coupled with preconcentration system
Speciation of arsenic(III) and arsenic(V) by inductively coupled plasma-atomic emission spectrometry coupled with preconcentration system
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DOI：
10.1016/j.talanta.2004.09.024
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发表时间：
2005-04-30
期刊：
影响因子：
6.1
通讯作者：
Motomizu, S
中科院分区：
文献类型：
--
作者：
Jitmanee, K;Oshima, M;Motomizu, S
建立了一种同时测定淡水样品中As（III）和As（V）的流动注射分析方法。两个微型柱与固相阴离子交换树脂，放置在两个6通阀被用于砷（III）和砷（V）的固相收集/浓缩，分别。As（III）在被氧化剂氧化成As（V）后可保留在柱上。然后用2 M硝酸依次洗脱收集的分析物，并引入ICP-AES。研究了高锰酸钾作为潜在氧化剂将As（III）转化为As（V）的方法。对于0.5 μ g l（-1）溶液的重复分析（n = 5），As（III）和As（V）的分析信号（峰高）的标准偏差分别为3%和5%。As（III）和As（V）的检测限（3 σ）均为0.1 μ g l（-1）。该体系用于淡水样品中无机砷形态的直接分析，结果令人满意。(c)2004 Elsevier B. V.保留所有权利。
A novel and simple flow-based method was developed for the simultaneous determination of As(III) and As(V) in freshwater samples. Two miniature columns with a solid phase anion exchange resin, placed on two 6-way valves were utilized for the solid-phase collection/concentration of arsenic(III) and arsenic(V), respectively. As(III) could be retained on the column after its oxidation to As(V) species with an oxidizing agent. The collected analytes were then sequentially eluted by 2M nitric acid and introduced into ICP-AES. Potassium permanganate was examined as potential oxidizing agent for conversion of As(III) to As(V). The standard deviation of the analytical signals (peak height) for the replicate analysis (n = 5) of 0.5 mu g l(-1) solution were 3 and 5% for As(III) and As(V), respectively. The limit of detection (3 sigma) for both As(III) and As(V) were 0.1 mu g l(-1). The proposed system produced satisfactory results on the application to the direct analysis of inorganic arsenic species in freshwater samples. (c) 2004 Elsevier B.V. All rights reserved.