T/GZNFS 001.4-2019 Active Group standards

T/GZNFS 001.4-2019 Chemical Analysis Methods for Tungsten Slag - Part 4: Determination of Phosphorus Content

T/GZNFS 001.4-2019

Publish Date: 2019-12-02 Implement Date: 2019-12-02 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/GZNFS 001.4-2019

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Metal chemical analysis methods

ICS Name: Other non-ferrous metals and their alloys

Publish Date: 2019-12-02

Implement Date: 2019-12-02

Scope

Scope: This part of T/GZNFS 001 specifies the method for determining the phosphorus content in alkali slag (tungsten slag) produced during the alkali decomposition process of ammonium paratungstate. This part is applicable to the determination of phosphorus content in alkali slag (tungsten slag) produced during the alkali decomposition process of ammonium paratungstate. The determination range (mass fraction) is 0.10% to 10.00%; Main technical content: After the sample is alkali-melted and extracted, phosphorus is coprecipitated with beryllium hydroxide as a carrier in an ammonia solution to separate it from other elements. In a nitric acid solution with a certain acidity, ammonium vanadate-ammonium molybdate is used as a color reagent, and its absorbance is measured at 420 nm using a spectrophotometer.