Standard No.:	GB/T 5121.16-2008
Chinese Name:	铜及铜合金化学分析方法 第16部分：铬含量的测定
English Name:	Methods for chemical analysis of copper and copper alloys—Part 15:Determination of cobalt 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/T13293.3-1991 Higher purity copper cathode. Determination of bismuth contene. Hydride generation-atomic fluorescence spectrometric method
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	120 (USD)
Delivery:	via email in 1-3 business day

1.1 Scope
This method specifies the method for determining chromium content in copper and copper alloys.
This method is applicable to the determination of chromium content in copper and copper alloys. The determination range is: 0.00005%~0.0010%.
1.2 Principle
Dissolve the test sample with nitric acid and then inject the test solution of certain volume into the electrothermal atomizer; measure the chromium absorbance at the wavelength of 357.9nm with the Zeeman effect atomic absorption spectrometer, and then calculate the mass fraction of chromium in the adoption of the working curve method.
1.3 Reagents
Unless otherwise stated, only identified analytical reagent and distilled water, or deionized water or water with equivalent purity shall be used for analysis. Vessels used for test shall be thoroughly rinsed with water after being soaked in nitric acid (1.3.3) for 12h.