Verification Analysis of Determination Ability of Oxygen and Nitrogen Content in Steel
In order to understand the ability of domestic laboratories to determine the content of oxygen and nitrogen in steel,the verification activity of measuring the content of oxygen and nitrogen in steel was organized.One way ANOVA was adopted in the homogeneity examination of samples for the proficiency test.By traditional statistical techniques,the assigned value and standard deviation for proficiency assessment were calculated after removing outlier by Grubbs method.The z-ratio score was used to determine the test results of each laboratory.The results show that there are 8 laboratories with satisfactory results,accounting for 72.73%of the total number of participating laboratories.Most laboratories have satisfactory testing ability and level.
capability verificationsteeloxygen and nitrogen content
万方数据
维普
