2015YS/T 569.7-2015 Methods for chemical analysis of thallium.Part 7:Determination of aluminum content.Chrome azurol S spectrophotometry
2006YS/T 569.7-2006 Determination of aluminum content in thallium (chrome azure S absorptiometry)
YS/T 569.7-2006 Determination of aluminum content in thallium (chrome azure S absorptiometry) has been changed from GB/T 2592.7-1981 Thallium--Determination of aluminum content--Chromazurol S photometric method.