GB/T 12689.11-2004 The methods for chemical analysis of zinc and zinc alloys-The determination of lanthanum and cerium contents-The tri-bromide arsenazo spectrophotometric method (English Version)
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 12689.11-2004
Scope
This part specifies the method for the determination of lanthanum and cerium in zinc and zinc alloys. This section applies to the determination of lanthanum and cerium in zinc and zinc alloys. Measuring range: 0.005 0% to 0.20%.
GB/T 12689.11-2004 history
2004GB/T 12689.4-2004 The methods for chemical analysis of zinc and zinc alloys-The determination of copper content-The lead diethyldithio-carbamate spectrophotometric method and the flame atomic absorption spectrometric method and the electrolytic method
1990GB/T 12689.2-1990 Zinc and zinc alloys--Determination of copper content--Lead diethyldithio-carbamate spectrophotometric method