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 molybdenum and tungsten in salt rocks. Measuring range: 0.25~10μg/g molybdenum. 0.50~20μg/g tungsten. This standard complies with the provisions of GB/T14505.
GB/T 14506.25-1993 history
2010GB/T 14506.25-2010 Methods for chemical analysis of silicate rocks.Part 25:Determination of molybdenum and tungsten content
1993GB/T 14506.25-1993 Silicate rocks. Determination of molybdenum and tungsten content. Sulfuric acid-phenylhydroxyacetic acid-cinchonine-potassium chlorate medium polarographic method