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Developments and Interlaboratory Study of the Analysis of Short-Chain Chlorinated Paraffins
Trends in Analytical Chemistry ( IF 13.1 ) Pub Date : 2018-02-01 , DOI: 10.1016/j.trac.2018.01.004
L.M. van Mourik , I. van der Veen , S. Crum , J. de Boer

To survey the conformity and quality of the results between laboratories for short-chain chlorinated paraffins (SCCPs) determination, we reviewed current and novel analytical methods and organized four worldwide laboratory exercises between 2011 and 2017.

Participants were requested to analyse test solutions and extracts of various matrices with their method of choice. Thirty-three laboratories participated (9-22 per round), of which 55-81% were able to submit data.

Large differences in results between laboratories were found (CVs 23-137%) but results improved over time, while the levels in the test materials decreased. In the last round acceptable CV values (<25%) were obtained for the test solution. In the last round, results obtained by the GC-ECNI-LRMS technique varied most, which is disconcerting as this technique is most commonly applied. We strongly suggest to continue monitoring comparability of laboratories to assess consensus in SCCP analysis, with a focus on quantification procedures applied.



中文翻译:

短链氯化石蜡分析的发展和实验室间研究

为了调查实验室之间用于短链氯化石蜡(SCCP)测定的结果的一致性和质量,我们回顾了当前和新颖的分析方法,并在2011年至2017年之间组织了四次全球实验室练习。

要求参与者使用他们选择的方法来分析测试溶液和各种基质的提取物。有33个实验室参加(每轮9-22个实验室),其中55-81%的实验室能够提交数据。

发现实验室之间的结果差异很大(CV为23-137%),但随着时间的推移,结果有所改善,而测试材料中的水平却下降了。在最后一轮中,测试溶液的CV值可接受(<25%)。在最后一轮中,通过GC-ECNI-LRMS技术获得的结果变化最大,这令人感到不安,因为该技术最常用。我们强烈建议继续监控实验室的可比性,以评估SCCP分析中的共识,重点是应用量化程序。

更新日期:2018-02-02
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