GB 223.19-1989 Methods for chemical analysis of iron steel and alloy; The neocuproine-chloroform extraction photometric method for the determination of copper content (English Version)
Methods for chemical analysis of iron steel and alloy; The neocuproine-chloroform extraction photometric method for the determination of copper content
This standard specifies the determination of copper content with the neocuproine-chloroform extraction photometric method.
This standard is applicable to determination of copper content in the pig iron, carbon steel, alloy steel, high temperature alloy and precious alloy. Determination range: 0.010% ~1.00%.
2 Method Summary
Dissolve sample with acid, reduce copper into univalence with hydroxylamine hydrochloride if citric acid is available, in the range of pH 5~6, neocuproine and copper produce the 2:1 insoluble yellow complex compound, extract it with chloroform, and measure its absorbance. Chromium has negative interference if it is larger than 4mg in the extraction solution and other common coexisting elements all are free from interference.
1 Subject Content and Application Scope 2 Method Summary 3 Reagents 4 Analytical Procedure 5 Calculation of Analytical Result 6 Precision Additional Explanation
GB 223.19-1989 Methods for chemical analysis of iron steel and alloy; The neocuproine-chloroform extraction photometric method for the determination of copper content (English Version)
Standard No.
GB 223.19-1989
Status
valid
Language
English
File Format
PDF
Word Count
1500 words
Price(USD)
30.0
Implemented on
1990-7-1
Delivery
via email in 1 business day
Detail of GB 223.19-1989
Standard No.
GB 223.19-1989
English Name
Methods for chemical analysis of iron steel and alloy; The neocuproine-chloroform extraction photometric method for the determination of copper content
1 Subject Content and Application Scope
This standard specifies the determination of copper content with the neocuproine-chloroform extraction photometric method.
This standard is applicable to determination of copper content in the pig iron, carbon steel, alloy steel, high temperature alloy and precious alloy. Determination range: 0.010% ~1.00%.
2 Method Summary
Dissolve sample with acid, reduce copper into univalence with hydroxylamine hydrochloride if citric acid is available, in the range of pH 5~6, neocuproine and copper produce the 2:1 insoluble yellow complex compound, extract it with chloroform, and measure its absorbance. Chromium has negative interference if it is larger than 4mg in the extraction solution and other common coexisting elements all are free from interference.
Contents of GB 223.19-1989
1 Subject Content and Application Scope
2 Method Summary
3 Reagents
4 Analytical Procedure
5 Calculation of Analytical Result
6 Precision
Additional Explanation
