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 zinc in salt rocks. Measuring range: ammonium hydroxide-ammonium chloride bottom solution polarography method, zinc above 25μg/g. Ethylenediamine base solution polarography method, 20-2000μg/g zinc. Flame atomic absorption spectrophotometry, 5-200μg/g zinc. This standard complies with the provisions of GB/T14505.
GB/T 14506.20-1993 history
2010GB/T 14506.20-2010 Methods for chemical analysis of silicate rocks.Part 20:Determination of zinc content