This part of GB/Work 20975 specifies the determination of lead content in aluminum and aluminum alloys by potassium iodide spectrophotometry and Na EDTA titration. This part is applicable to the arbitration determination of uniform content in aluminum and aluminum alloys. Potassium iodide spectrophotometric determination range: 0.010%%-2.30 NasEDTA titration determination range: >2.50%%-11.00%%.
GB/T 20975.32-2020 Referenced Document
GB/T 8005 Aluminium and aluminium alloys--Terms and definitions
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 20975.32-2020 history
2020GB/T 20975.32-2020 Methods for chemical analysis of aluminium and aluminium alloys—Part 32:Determination of bismuth content