This part of GB/T 20975 specifies the xylenol spectrophotometric method and Naz*EDTA titration method for the determination of clamp content in aluminum and aluminum alloys. This section applies to the arbitration determination of clamp content in aluminum and aluminum alloys. The determination range of xylenol orange spectrophotometry: 0.010%% to 1.00%; the determination range of Na*EDTA titration method: 2.50% to 18.00%%.
GB/T 20975.19-2020 Referenced Document
GB/T 8005.2 Terms of aluminium and aluminium alloys—Part 2:Chemical analysis
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 20975.19-2020 history
2020GB/T 20975.19-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 19:Determination of zirconium content
2008GB/T 20975.19-2008 Methods for chemical analysis of aluminium and aluminium alloys.Part 19: Determination of zirconium content
2001GB/T 6987.19-2001 Aluminium and aluminium alloys--Determination of zirconium content--Xylenol orange photometric method