2015YS/T 569.3-2015 Methods for chemical analysis of thallium.Part 3:Determination of mercury content.Dithizone carbon tetrachloride extraction spectrophotometry
2006YS/T 569.3-2006 Determination of mercury in thallium (dithizone carbon tetrachloride extraction absorptiometry)
YS/T 569.3-2006 Determination of mercury in thallium (dithizone carbon tetrachloride extraction absorptiometry) has been changed from GB/T 2592.3-1981 Thallium--Determination of mercury content--Dithizone-carbon tetrachloride extraction photometric method.