Research on Homogeneity and Stability of Cadmium Content in Rice Samples Used for Proficiency Testing
By testing the uniformity and stability of cadmium content in rice with 3 different concentration gradients,the samples meeting the requirements of capability verification were determined.In this experiment,the uniformity of samples was evaluated by single factor ANOVA and the stability of samples was evaluated by t-test.The results showed that at room temperature of 25℃,the samples with 3 concentration gradients had no significant difference in their own samples and between samples.The results showed that the homogeneity of the samples met the requirements of the ability to verify the samples,and the samples had good stability during the testing period.The capability verification program can be distributed as a capability verification sample to various laboratories for the detection of cadmium content in rice.
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