[The international intercalibration study on dioxins in foods, analysis of results, and the application in QA/QC]
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Lei Zhang1, Jingguang Li, Yunfeng Zhao
1The Key Laboratory of Food Safety Risk Assessment, Ministry of Health (CFSA), and China National Center of 100021, China Food Safety and Risk Assessment, Beijing, China. carpeto@163.com
Objective:
To study the application of international intercalibration study in quality assurance and control (QA/QC) by the analysis of our laboratory' s results from interlaboratory comparison on dioxins in foods from 2005-2012.
Methods:
Z-scores were used to appraise the results from the interlaboratory comparison on dioxins in foods organized by Norwegian Institute of Public Health, and analyze the determination of PCDD/Fs and dl-PCBs in various foods.
Results:
The absolute values of z-score of concentrations of PCDD/Fs and dl-PCBs in almost all foods determined by our laboratory are were all less than 1, indicating excellent results.
Conclusion:
The international intercalibration study is a greatly effectively approach of QA/QC. Thus, qualified laboratories should be encouraged more involved in international comparison to improve the detection ability and the reliability of the results.
