Standard No.:	GB/T 5121.20-2008
Chinese Name:	铜及铜合金化学分析方法 第20部分：锆含量的测定
English Name:	Methods for chemical analysis of copper and copper alloys—Part 20:Determination of zirconium content
Professional Classification:	H13 Heavy metals and their alloys analysis method
Professional Classification:	GB National Standard
ICS Classification:	77.120.30 Copper and copper alloys
Issued by:
Issued on:	2008-06-17
Implemented on:	2008-12-01
Status:	VALID
Replace:	GB/T5121.20-1996 Copper and copper alloys-Determination of zirconium content
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	120 (USD)
Delivery:	via email in 1-3 business day

1 Scope

This part specifies the determination method for zirconium content in copper and copper alloys.
This part is applicable to the determination of zirconium content in copper and copper alloys, and the determination range is 0.10% ~ 0.70%.

2 Principle

Dissolve the test portion into hydrochloric acid and hydogen peroxide and adjust the acidity with perchloric acid, then determine the absorbance with an spectrophotometer at the wavelength of 540nm, with the xylenol orange as the developer and the test portion solution, to which the ethylene diamine tetraacetic acid (EDTA) is added for the screening of zirconium, as reference.