期刊
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
卷 51, 期 -, 页码 127-143出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.trac.2013.07.007
关键词
Analytical performance; Aqueous sample; Chromatography; Free fatty acid; Interlaboratory comparison; International comparative study; Monitoring; Proficiency-testing scheme; Source of error; Volatile fatty acid
This first international proficiency-testing scheme evaluated the analytical performance and the state of practice in measurement of volatile fatty acids in aqueous samples. Gas chromatography and high-performance liquid chromatography were used by 25 laboratories from 15 different countries. Two reference materials were selected for analysis. The performance of each laboratory was assessed by the internationally-accepted z-score. The overall performance was rather poor. Among the causes of poor analytical performance, human errors and inadequate calibration were probably the major problems encountered. (C) 2013 Elsevier Ltd. All rights reserved.
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