碳氮稳定同位素检测能力的验证——2013年实验室间比对分析结果的汇总
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Testing of proficiency for measurement of carbon and nitrogen stable isotopes
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    摘要:

    利用实验室间比对可以验证实验室的检测能力。稳定性同位素示踪技术已广泛地应用于农业化学、地球化学和环境化学,特别是碳、氮稳定性同位素的应用。碳、氮同位素比值的检测结果直接关系到示踪试验的可靠性。在目前缺乏富集碳、氮同位素的标准物质的条件下,可以通过实验室间的比对验证各实验室的碳、氮同位素比值检测结果的准确性和可比性。本文就2013年实验室间比对的结果进行了汇总。

    Abstract:

    Stable isotope tracer techniques, especially the use of carbon and nitrogen stable isotopes have been extensively applied in agricultural chemistry, geochemistry, and environmental chemistry. Calibration of mass spectrometers for precision in analysis of carbon and nitrogen isotope ratios are directly related to the reliability of the tracer experiments. Currently, as reference materials enriched in carbon and nitrogen stable isotopes are not readily available for calibration, it is advisable to verify accuracy of the instruments and comparability of their analyses through comparison between laboratories in carbon and nitrogen isotope ratio detection capability. For that, in 2013, a total of 14 testing laboratories and a total of 17 sets of equipment all over the country were invited to participate in the comparison sponsored by the Institute of Soil Science, Chinese Academy of Sciences. Agricultural, ecological and environmental samples were used in the test for comparison. The institute also prepared a variety of test samples, including carbon and nitrogen-containing chemical fertilizers, soils and plant samples. For analysis of stable isotopes, samples natural in isotope abundance and different in isotope enrichment level were also prepared. Besides solid samples, there were 3 kinds of N2O and CO2 gas samples different in isotope abundance for analysis. The Z score method was used to measure reliability of the analysis in each laboratory. In this paper, comparisons between the 14 laboratories were summarized in 2013.

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曹亚澄,韩 勇,唐昊冶,王 曦,孙德玲,孙玉芳,孙晓丽.碳氮稳定同位素检测能力的验证——2013年实验室间比对分析结果的汇总[J].土壤学报,2015,52(1):212-219. DOI:10.11766/trxb201403100098 Cao Yacheng, Han Yong, Tang Haoye, Wang Xi, Sun Deling, Sun Yufang, Sun Xiaoli. Testing of proficiency for measurement of carbon and nitrogen stable isotopes[J]. Acta Pedologica Sinica,2015,52(1):212-219.

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  • 收稿日期:2014-03-10
  • 最后修改日期:2014-06-17
  • 录用日期:2014-06-19
  • 在线发布日期: 2014-10-22
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