Methods And Practice for Period Verification of Water Quality Reference Materials
The period verification of reference materials plays a vital role in the quality control of water monitoring.Carrying out the period verification can ensure that the reference materials are controlled and reliable.Combined with practical work of water monitoring,the methods and result evaluations of the inspection including En check and control chart during the period of reference materials were discussed.In addition,the calculation formula,application conditions and the evaluation standard were introduced.The batch number 202199 pH reference material was taken as example.After check,the results show that the value of 202199 pH reference material was stable.The period verification result was qualified.This study could provide reference for the period verification of water quality reference materials.
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