2015YS/T 569.5-2015 Methods for chemical analysis of thallium.Part 5:Determination of cadmium content.Dithizone benzene extraction spectrophotometry
2006YS/T 569.5-2006 Determination of cadmium in thallium (dithizone benzene extraction absorptiometry)
YS/T 569.5-2006 Determination of cadmium in thallium (dithizone benzene extraction absorptiometry) has been changed from GB/T 2592.5-1981 Thallium--Determination of cadmium content--Dithizone extraction photometric method.