GB/T 7731.15-1999 Methods for chemical analysis of ferrotungsten-The flame atomic absorption spectrometric method for the determination of copper content (English Version)
This standard specifies the determination of copper content by flame atomic absorption spectrometry. This standard applies to the determination of the amount of copper in ferro-tungsten. Measuring range: 0.02%~0.2%.
GB/T 7731.15-1999 history
2008GB/T 7731.3-2008 Ferrotungsten. Determination of copper content. Bis(cyclohexanone) oxalyldihydrazone photometric method and flame atomic absorption spectrometric method
1999GB/T 7731.15-1999 Methods for chemical analysis of ferrotungsten-The flame atomic absorption spectrometric method for the determination of copper content
GB/T 7731.15-1999 Methods for chemical analysis of ferrotungsten-The flame atomic absorption spectrometric method for the determination of copper content was changed to GB/T 7731.3-2008 Ferrotungsten. Determination of copper content. Bis(cyclohexanone) oxalyldihydrazone photometric method and flame atomic absorption spectrometric method.