Through the evaluation threshold of "group label" terms and definitions, evaluation objects, and "group label", the central moment test method, W test method, D test method, normality visual inspection method, lognormal distribution, and percentile method are used , normal distribution method, non-parametric allowable interval method and k-factor allowable interval method, etc., to give health evaluation thresholds for 38 trace elements contained in the hair of people of different genders and ages.
T/GDWJ 003-2020 history
2020T/GDWJ 003-2020 Health evaluation thresholds of 38 trace elements in human hair