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Vol. 27 No. 8 (2015): Vol 27 Issue 8

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A Single Analysis of Elements in Groundwater (ng L-1 to g L-1) by DRC ICP-MS Using Extended Dynamic Range Techniques

https://doi.org/10.14233/ajchem.2015.18292
Jiangyi Zhang
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, P.R. China
Wei Guo
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, P.R. China
Guomin Li
Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, P.R. China

Corresponding Author(s) : Wei Guo

Wei.Guo@cug.edu.cn

Asian Journal of Chemistry, Vol. 27 No. 8 (2015): Vol 27 Issue 8

Abstract

Simultaneous determination of elements in groundwater (ng L-1 to g L-1) in single analysis by DRC ICP-MS was developed. The technique of extended dynamic range based on DRC could be able to detune the signal response of selective elements to enable incorporation of high concentration elements (outside of the ion detector' dynamic range to 1e9 cps) into a single analysis without affecting signal response of other trace elements. The signal sensitivity of high concentration element (i.e., K, Na, Ca, Mg and Fe) was suppressed easily by adjusting the voltage parameters of DRC quadrupole (RPa) and the groundwater samples could be online diluted any multiples (i.e., from one time to million times) according to the actual need. In order to eliminate mass spectral interferences (i.e., 40Ar35Cl+, 40Ar40Ar+, 12C40Ar+, 44Ca16O+, 23Na40Ar+, 25Mg38Ar+ and 26Mg40Ar+), the operational conditions of the DRC, working with CH4 as reaction gas, were optimized for 75As, 80Se, 52Cr, 60Ni, 63Cu and 66Zn. The analytical results of a reference material CASS-5 were in good agreement with the certified values. Reliability of the data was also tested by comparing the results for 29 groundwater samples with those determined by ICP-OES and good agreement was obtained for the high concentration elements. As the routine method in our laboratory, the satisfactory results indicate that it has great potential for the determination of low and high concentration level elements by one single analysis in various samples.

Keywords

Extended dynamic range techniques ng L-1 to g L-1 level DRC ICP-MS Groundwater
Zhang, J., Guo, W., & Li, G. (2015). A Single Analysis of Elements in Groundwater (ng L-1 to g L-1) by DRC ICP-MS Using Extended Dynamic Range Techniques. Asian Journal of Chemistry, 27(8), 2933–2938. https://doi.org/10.14233/ajchem.2015.18292
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