This standard specifies the method for determination of nickel content in silver powder for electrical contacts. This standard is applicable to the determination of nickel content in silver powder for electrical contacts. Measuring range: 0.005% ~ 0.050%.
JB/T 6237.4-1992 history
2008JB/T 6237.4-2008 Test methods for chemical analysis of silver powder for electric contact material. Part 4: Determination of nickel content
1992JB/T 6237.4-1992 Silver powder chemical analysis method for electrical contacts 2-(5-bromo-2-pyridylamido)-5-diethylaminophenol spectrophotometric determination of nickel content