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 copper in salt rocks. Measuring range: ammonium hydroxide-ammonium chloride bottom liquid method is used to measure copper above 4μg/g by square wave polarography; copper above 10μg/g is measured by oscillopolarographic derivative part. Potassium thiocyanate-ethylenediamine-sodium sulfite bottom solution polarography, 5~125μg/g copper. Flame atomic absorption spectrophotometry, 5-500μg/g copper. This standard complies with the provisions of GB/T14505.
GB/T 14506.18-1993 history
2010GB/T 14506.18-2010 Methods for chemical analysis of silicate rocks.Part 18:Determination of copper content