Calibration bias of experimentally determined chlorine isotope enrichment factors: the need for a two-point calibration in compound-specific chlorine isotope analysis

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• 作者：Karin A. Ebert ; Christine Laskov ; Martin Elsner and Stefan B. Haderlein
• 刊名：Rapid Communications in Mass Spectrometry
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：31
• 期：1
• 页码：68-74
• 全文大小：343K
• ISSN：1097-0231

文摘

The recent development of compound-specific online chlorine isotope analysis (³⁷Cl-CSIA) methods has fostered dual chlorine–carbon isotope studies to gain better insights into sources and environmental transformation reactions of chlorinated ethenes. One-point and two-point calibration schemes are currently used to convert raw data to the international δ³⁷Cl_SMOC scale, but a critical evaluation of best practices to arrive at reliable δ³⁷Cl_SMOC signatures and enrichment factors was missing and is presented here.