Sulfur Isotope Analysis of Sulfide and Sulfate Minerals by Continuous Flow-Isotope Ratio Mass Spectrometry
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- 作者：N. V. Grassineau ; D. P. Mattey ; and D. Lowry
- 刊名：Analytical Chemistry
- 出版年：2001
- 出版时间：January 15, 2001
- 年：2001
- 卷：73
- 期：2
- 页码：220 - 225
- 全文大小：99K
- 年卷期：v.73,no.2(January 15, 2001)
- ISSN：1520-6882
文摘
A continuous flow method (CF-IRMS) for the rapid determination of the sulfur isotope composition of sulfideand sulfate minerals has significant advantages over theclassic extraction method in terms of the reduced samplequantity and a rapid analytical cycle of less than 8 min/analysis. For optimum performance, the technique issensitive to a number of operating parameters, includingsample weight and the O2 saturation of the Cu-reductionreactor. Raw data are corrected using a calibration basedon five international and internal standards ranging from-17.3 to +20.3”, which requires monitoring in orderto correct the effect of changing 
18O of the sample gason the measured mass 66 values. Measured sulfurcontents are within 1-1.5% of expected values and thereproducibility of 34S values is ±0.1” (1
). The technique has been used successfully for more than 1000analyses of geological samples with a wide range of 34Sfrom -20 to +20”.
18O of the sample gason the measured mass 66 values. Measured sulfurcontents are within 1-1.5% of expected values and thereproducibility of 34S values is ±0.1” (1). The technique has been used successfully for more than 1000analyses of geological samples with a wide range of 34Sfrom -20 to +20”.