This standard is applicable to biotite granite, rhyolite, granodiorite, quartz hornblend andesite, olivine basalt, gabbro, trachyandesite, nexia syenite, sandstone, shale and other silica with similar composition Determination of nickel and cobalt in salt rocks. Measuring range: 5~200μg/g nickel and cobalt. This standard complies with the provisions of GB/T14505.
GB/T 14506.21-1993 history
2010GB/T 14506.21-2010 Methods for chemical analysis of silicate rocks.Part 21:Determination of nickel and cobalt content
1993GB/T 14506.21-1993 Sillicate rocks. Determination of nickel and cobalt content. Ammonium hydroxide-ammonium chloride-sulfosalicylic acid-dimethyl glyoxime medium polarographic method