Preparation of chlorpyrifos samples in spinach and study on proficiency testing for laboratory determination
The objective of this proficiency testing is to analyze and evaluate the proficiency testing program for the determination of chlorpyrifos samples in spinach.Single level is prepared,examining sample was conducted through the im-plementation of the plan of ability test and verify.57 laboratory from 10 cities in this provinces and another province were measured and the results were conducted for robust statistical analysis,robust Z ratio fraction was used for laboratory testing capability.The test results showed a normal distribution.Total of 57 laboratories participated in the PTP,among which 54 laboratories had satisfactory results,accounting for 94.7％,2 laboratories(3.5％)had suspicious results,and 1 laboratories(1.8％)had unsatisfactory results.The results indicate that the determination of chlorpyrifos in spinach shows a overall good level.The outlier results are analyzed to help laboratory find the cause and carry out rectification.
万方数据
维普
