Testing methods for Ammonium Metatungstate mainly include the following, which are indicated and summarized in points according to a clear format:
National standard testing methods
GB/T 26033-2010: This is the national standard of Ammonium Metatungstate, which contains various requirements and test methods about Ammonium Metatungstate.
Chemical analysis methods
GB/T 23368.1-2009.
Part 1 of the chemical analysis method for ammonium metatungstate, specifically related to the determination of the amount of water-insoluble substance. This part mainly uses the weighing method to determine the amount of water-insoluble substance in ammonium metatungstate.
GB/T 23368.2-2009
Part 2 of the chemical analytical method for ammonium metatungstate, specifying the determination of the amount of zinc. This part mainly uses flame atomic absorption spectrometry to determine the content of zinc in ammonium metatungstate.
Other Determination Methods
ICP-OES method (Inductively Coupled Plasma Emission Spectrometer)
This method can be used to determine the content of Co and other impurity elements in ammonium metatungstate, with the advantages of low detection limit, high sensitivity and resistance to matrix interference. For example, ICP-5000 vertical observation mode can be used to detect the content of 15 impurity elements such as Co in ammonium paratungstate.
AA-1800 Atomic Absorption Method
This method can directly determine the content of impurity element potassium in ammonium paratungstate (APT).
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