氢化物发生-原子荧光光谱法测定土壤中水溶态砷(Ⅲ)和砷(Ⅴ)

于兆水; 张勤; 刘玲

氢化物发生-原子荧光光谱法测定土壤中水溶态砷(Ⅲ)和砷(Ⅴ)

1.
中国地质科学院地球物理地球化学勘查研究所, 河北廊坊 065000
2.
中国地质科学院地球物理地球化学勘查研究所, 河北廊坊 065000
3.
北京大学化学与分子工程学院, 北京 100871

基金项目:

中国地质大调查项目(1212010511218)

计量
- 文章访问数: 1487
- HTML全文浏览量: 0
- PDF下载量: 1389
出版历程
- 收稿日期: 2011-10-11

Determination of Water Soluble As(Ⅲ) and As(Ⅴ) in Soil by Hydride Generation-Atomic Fluorescence Spectrometry

1.
Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China
2.
Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China
3.
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

摘要

摘要: 以氢气发生器为氩-氢火焰提供纯净、稳定的氢气,原子荧光光谱法测定土壤中水溶态和可交换态Sb(Ⅲ)和Sb(Ⅴ)已有应用,本研究进一步将此方法用于测定土壤样品中的As(Ⅲ)和As(Ⅴ)。在0.3 mol/L NaH₂PO₄-Na₂HPO₄缓冲液中,采用氢化物发生-原子荧光光谱法测定土壤中水溶态As(Ⅲ)和总砷的含量,通过差减法计算As(Ⅴ)的含量。实验考察了0.02~0.4 mol/L NaH₂PO₄-Na₂HPO₄对As(Ⅲ)和As(Ⅴ)测定的影响,结果表明0.3 mol/L NaH₂PO₄-Na₂HPO₄可以有效掩蔽As(Ⅴ)。As(Ⅲ)的检出限为2.92 ng/g,总砷的检出限为2.35 ng/g;As(Ⅲ)和As(Ⅴ)的加标回收率分别为96%~104%和101%~103%。本方法不再依靠化学反应产生氢气来点燃并维持氩氢火焰,可在发生氢化反应的任何介质中测定砷,且不需要考虑酸度问题。方法操作简便,准确度高,能满足大批量样品分析要求。
- 土壤 /
- 水溶态 /
- As(Ⅲ) /
- As(Ⅴ) /
- 氢化物发生-原子荧光光谱法 /
- 氢气
Abstract: Based on the determination method of Sb(Ⅲ) and Sb(Ⅴ) in soil, a method for the determination of water soluble As(Ⅲ) and total arsenic in soil has been established by using Hydride Generation-Atomic Fluorescence Spectrometry (HG-AFS) in the media of 0.3 mol/L NaH₂PO₄-Na₂HPO₄. An amount of As(Ⅴ) was obtained by subtracting As(Ⅲ) from total arsenic. The hydrogen was provided from a hydrogen generator instead of chemical reaction to ignite a H₂-Ar flame. Therefore, arsenic in any media was measurable since the arsenic was reduced into AsH₃. Effects on the determination of As(Ⅲ) and As(Ⅴ) were investigated for concentrations of NaH₂PO₄-Na₂HPO₄ from 0.02 mol/L to 0.4 mol/L. The results show As(Ⅴ) can be screened by 0.3 mol/L NaH₂PO₄-Na₂HPO₄. The detection limits were 2.92 ng/g for As(Ⅲ) and 2.35 ng/g for total As. The recoveries of As(Ⅲ) and As(Ⅴ) are 96%-104% and 101%-103%, respectively. The method was simple and highly accurate, meeting the requirements for multiple sample analysis.
- soil /
- water /
- soluble /
- As(Ⅲ) /
- As(Ⅴ) /
- Hydride

HTML全文

参考文献(11)

Molenat N, Astruc A, Holeman M, Maury G, Pinel R. Arsenic speciation by hydride generation-quartz furnace atomic absorption spectrometry [J].Analysis, 1999, 27: 795-803.

Niedzielski P, Siepak M, Siepak J, Przybylek J. Deter-mination of different forms of arsenic, antimony and selenium in water samples using hydride generation [J]. Polish Journal of Environmental Studies, 2002, 11(3): 219-224.

Hirata S, Toshimitsu H, Aihara M. Determination of arsenic species in marine samples by HPLC-ICP-MS [J]. Analytical Sciences, 2006, 22: 39-43.

程迪,于洁.基于POS的神经网络在分光光度法同时测定As(Ⅲ)和As(Ⅴ)中的应用[J].新乡学院学报: 自然科学版,2009,26(2): 57-59.

杨莉丽,李娜,张德强.氢化物发生-双道原子荧光光谱法同时测定中药中不同形态的砷和锑[J].光谱学与光谱分析,2007,27(4): 810-812.

杨莉丽,高丽荣,张德强.树脂分离-氢化物发生-原子荧光光谱法测定中草药中不同形态的砷[J].光谱学与光谱分析,2004,24(4): 491-494.

索有瑞,黄雅丽.氢化物原子荧光光谱法测定水中痕量砷(Ⅲ)和砷(Ⅴ)[J].环境化学,1990,9(1): 54-58.

顾徽,杨惠芬.氢化物发生-原子荧光光谱法(HG-AFS)测定食品中不同价态的无机砷[J].卫生研究,1999,28(6): 372-374.

刘汉东,史建波,池泉,汤志勇,金泽祥,熊采华.流动注射氢化物发生-原子荧光光谱法测定土壤中有效态As(Ⅲ)和As(Ⅴ) [J].光谱学与光谱分析,2002,22(5): 862-864.

侯静,弓振斌,郭旭明,黄本立.流动注射-氢化物发生-非色散原子荧光光谱法直接测定海水中的砷(Ⅲ)和砷(Ⅴ)的研究[J].分析试验室,2000,19(6): 13-16.

于兆水,张勤.氢化物发生-原子荧光光谱法直接测定土壤水溶态和可交换态Sb(Ⅲ)和Sb(Ⅴ)[J].岩矿测试,2010,29(1): 34-38.

施引文献

资源附件(0)

计量

文章访问数: 1487
HTML全文浏览量: 0
PDF下载量: 1389
被引次数: 0

氢化物发生-原子荧光光谱法测定土壤中水溶态砷(Ⅲ)和砷(Ⅴ)

计量

出版历程

Determination of Water Soluble As(Ⅲ) and As(Ⅴ) in Soil by Hydride Generation-Atomic Fluorescence Spectrometry

计量

出版历程

目录