Precise Analysis of Gallium Isotopic Composition by MC-ICP-MS

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	Precise Analysis of Gallium Isotopic Composition by MC-ICP-MS
	Hong Ming Cai; Zhu Hong Wang; Qiang Huang; Zhong Wei Wang; Sheng Liu Yuan; Zuo Ying Yin; Jean-Louis Birck; Jiu Bin Chen; Wei Yuan
刊名	Analytical Chemistry
	2016
卷号	88 期号:19 页码:9606-9613
英文摘要	Though an isotope approach could be beneficial for better understanding the biogeochemical cycle of gallium (Ga), an analogue of the monoisotopic element aluminum (Al), the geochemistry of Ga isotopes has not been widely elaborated. We developed a two-step method for purifying Ga from geological (biological) samples for precise measurement of Ga isotope ratio using multicollector inductively coupled plasma mass spectrometry (MC-ICP-MS). Ga was thoroughly separated from other matrix, elements using two chromatographic columns loaded with AG 1-X4 and Ln-spec resin, respectively. The separation method was carefully calibrated using both synthetic and natural samples and validated by assessing the extraction yield (99.8 +/- 0.8%, 2SD, n = 23) and the reproducibility (2SD uncertainty better than 0.05 parts per thousand, n = 116) of the measured isotopic ratio (expressed as delta Ga-71). The validation of the whole protocol, together with instrumental analysis, was confirmed by the investigation of the matrix effect, the result of a standard addition experiment, and the comparison of Ga isotope measurement on two mass spectrometers-Nu Plasma II and Neptune Plus. Although the measurements using the sample-standard bracketing (SSB) correction method on both instruments resulted in identical delta Ga-71 values for reference materials, the modified empirical external normalization (MEEN) method gave relatively better precision compared to SSB on Neptune. Our preliminary results showed large variation of delta Ga-71 (up to 1.83 parts per thousand) for 10 standards, with higher values in industrially produced materials, implying potential application of Ga isotopes.
学科主题	环境地球化学
语种	英语
公开日期	2017-11-22
内容类型	期刊论文
源URL	[http://ir.gyig.ac.cn:8080/handle/352002/6551]
专题	地球化学研究所_环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Hong Ming Cai,Zhu Hong Wang,Qiang Huang,et al. Precise Analysis of Gallium Isotopic Composition by MC-ICP-MS[J]. Analytical Chemistry,2016,88(19):9606-9613.
APA	Hong Ming Cai.,Zhu Hong Wang.,Qiang Huang.,Zhong Wei Wang.,Sheng Liu Yuan.,...&Wei Yuan.(2016).Precise Analysis of Gallium Isotopic Composition by MC-ICP-MS.Analytical Chemistry,88(19),9606-9613.
MLA	Hong Ming Cai,et al."Precise Analysis of Gallium Isotopic Composition by MC-ICP-MS".Analytical Chemistry 88.19(2016):9606-9613.