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The Study of Bismuth Ions in Drinking Water at Ultratrace Levels by Microwave Plasma Torch Coupled with the Linear Ion Trap Mass Spectrometry

Abstract

Microwave plasma torch (MPT) can be used as a simple and low power-consumption ambient ion source and coupled with several kinds of mass spectrometers. When MPT Mass spectrometry is applied in the detection of some metal elements, the metallic ions exhibit some novel features which are significantly different with those obtained by the traditional ICP Mass spectrometry and may be helpful for the metal element analysis. As a representative metal element of VA group, bismuth is of crucial importance which was widely applied in modern industry and has great impact on human health potentially. Here, we presented a resultful research on the complex ions of bismuth in water by using the MPT ion source coupled with a linear ion trap mass spectrometer (LTQ-MS). These complex ions were produced by plasma flame in the aqueous solution which flew through the central tube of the MPT, and were introduced into the inlet of the mass spectrometer. We also employed another quadrupole mass spectrometer (QMS) for the comparison of the different ionic patterns which obtained in these two mass spectrometers. Moreover, the feature fragment patterns of these ions have been deduced in multi-step collision induced dissociation processes. Under the optimized conditions and negative working mode of LTQ-MS, the limit of detection (LOD) of bismuth in LTQ-MS MS2 procedure is 0.0284 g/L, reaching at ultratrace levels. The linear range cover the range of 0.5~50 g/L and relative standard deviation (RSD, n=6) alters between 1.7% and 7.0%. The standard addition recovery rates of five bands of drinking water were between the range of 83.74% and 113.7%. These experimental data demonstrated that the MPT MS is a promising and hopeful tool in field analysis of metallic ions for water samples, which also can be applied in many other fields, such as environmental controlling, hydrogeology, water quality inspection and food analysis. In addition, MPT MS could also be used as the supplement of ICP-MS for the rapid and on-site analysis of metal ions.

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Publication details

The article was received on 11 Dec 2017, accepted on 01 Feb 2018 and first published on 02 Feb 2018


Article type: Paper
DOI: 10.1039/C7AY02857A
Citation: Anal. Methods, 2018, Accepted Manuscript
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    The Study of Bismuth Ions in Drinking Water at Ultratrace Levels by Microwave Plasma Torch Coupled with the Linear Ion Trap Mass Spectrometry

    X. Xiong, G. Chen, M. Zhu, C. Yang, Y. Li, K. Xie and Z. Zhu, Anal. Methods, 2018, Accepted Manuscript , DOI: 10.1039/C7AY02857A

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