Soil monitoring of arsenic by methanol addition DRC ICP-MS after boiling aqua regia extraction
Soil monitoring of arsenic by methanol addition DRC ICP-MS after boiling aqua regia extraction
复制标题
王水煮沸提取后添加甲醇 DRC ICP-MS 监测土壤砷
DOI：
10.1039/c1ja10126a
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发表时间：
2011-10
影响因子：
3.4
通讯作者：
Zhang, Hongfei
中科院分区：
文献类型：
--
作者：
Guo, Wei;Hu, Shenghong;Zhang, Jiangyi;Jin, Lanlan;Wang, Xiuji;Zhu, Zhenli;Zhang, Hongfei
传统的密闭消解ICP-QMS法测定土壤样品中痕量砷（As）时，易受到基体离子的干扰，主要有40 Ca ~（35）Cl ~+、40 Ar ~（35）Cl ~+、39 K ~（36）Ar ~+、150 Nd ~（2+）、150 Eu ~（2+）和150 Sm ~（2+）等。通过在动态反应池（DRC）中与氧反应，有效地转变为75 As 16 O+，其可以在m/z 91处检测到。针对91 Zr+对75 As 16 O+的新干扰，在制样过程中采用沸腾王水萃取除去大部分Zr，残留的91 Zr+在DRC中被氧气氧化为91 Zr 16 O+。此外，通过向样品溶液中加入4%甲醇，75 As 16 O的信号强度提高了4倍。砷的信噪比（SBR）从0.18提高到205（标准砷浓度为1 μg L-1），定量限（LOQ，10σ）为0.1 ng g-1。该方法成功地应用于20个养猪场土壤样品的分析，显示了该方法在环境和地质样品中痕量砷测定的巨大潜力。
Trace levels of arsenic (As) in soil samples can be determined by conventional ICP-QMS with closed vessel digestion, but always suffer from interference of ions originating from the complicated matrix, mainly including 40Ca35Cl+, 40Ar35Cl+, 39K36Ar+, 150Nd2+, 150Eu2+ and 150Sm2+etc. In this study, 75As+, the mass for general detection, was effectively changed to 75As16O+ which could be detected at m/z 91 by reaction with oxygen in a Dynamic Reaction Cell (DRC). For the new interference of 91Zr+ on 75As16O+, boiling aqua regia extraction was used to remove most of the zirconium in the sample preparation procedure, and the residual 91Zr+ was oxidized to 91Zr16O+ by oxygen in the DRC. In addition, the signal intensity of 75As16O was improved 4-fold by addition of 4% methanol into the sample solution. The signal to background ratio (SBR) of As was obviously improved from 0.18 to 205 (the certified arsenic concentration is 1 μg L−1), and a limit of quantification (LOQ, 10σ) of 0.1 ng g−1 was obtained. The proposed method was successfully applied to analyze 20 soil samples collected from pig farms in livestock farming processes, and shows its great potential for trace As determination in environmental and geological samples.
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影响因子：
3.4
作者：
S. Tanner;V. Baranov;U. Völlkopf
通讯作者：
S. Tanner;V. Baranov;U. Völlkopf
DOI：
10.1016/j.sab.2004.05.013
发表时间：
2004-09
期刊：
Spectrochimica Acta Part B: Atomic Spectroscopy
影响因子：
--
作者：
D. E. Nixon;K. Neubauer;S. Eckdahl;J. Butz;M. Burritt
通讯作者：
D. E. Nixon;K. Neubauer;S. Eckdahl;J. Butz;M. Burritt
影响因子：
3.4
作者：
Q. Xie;R. Kerrich;Elaine C. Irving;K. Liber;F. Abou-Shakra
通讯作者：
Q. Xie;R. Kerrich;Elaine C. Irving;K. Liber;F. Abou-Shakra
影响因子：
11.4
作者：
Arai, Y;Lanzirotti, A;Sparks, DL
通讯作者：
Sparks, DL
影响因子：
3.4
作者：
Olesik, JW;Jones, DR
通讯作者：
Jones, DR