The chemical analysis items of Ammonium Metatungstate mainly include the following aspects, which will be indicated and summarized in points according to a clear format:
Determination of tungsten dioxide content
The content of tungsten dioxide in ammonium metatungstate is one of the important indexes for evaluating its quality. The content of tungsten dioxide in the sample can be accurately determined by specific chemical analysis methods.
Determination of impurity content
Determination of impurity content is essential to ensure the purity of ammonium metatungstate. The impurity elements that may be involved include phosphorus, silicon, aluminum, iron, calcium, magnesium and so on. The content of these impurity elements can be determined by appropriate chemical analysis methods.
Determination of water insoluble matter content
This is an important quality index for assessing the content of water-insoluble impurities in ammonium metatungstate. According to GB/T 23368.1-2009 standard, weighing method can be used to determine the content of water insoluble matter. Usually, the content of water insoluble matter should be between 0.0025% and 2%.
Determination of zinc content
If you need to know the zinc content in ammonium metatungstate, you can use flame atomic absorption spectrometry (GB/T 23368.2-2009) for determination. This method can provide accurate data of zinc content.
PH value test
PH value is a measure of the acidity or alkalinity of a solution. For ammonium metatungstate solution, the determination of PH value helps to understand its stability and applicability. It is usually measured using a PH meter.
Appearance quality check
Although appearance quality is not part of chemical analysis, it is still important for assessing the overall quality of Ammonium Metatungstate. Appearance quality checks include observations of color, form, and crystallinity.
Other possible chemical analysis items
According to specific needs and application scenarios, other chemical analysis items may be required, such as ICP-OES method (Inductively Coupled Plasma Emission Spectrometer) for determining the content of Co and other impurity elements, and AA-1800 Atomic Absorption method for directly determining the content of potassium, an impurity element in Ammonium Paratungstate (APT).
The above is a brief introduction to the chemical analysis items of ammonium metatungstate. It should be noted that the specific analytical items and methods may vary according to different application scenarios and standards. Therefore, when carrying out chemical analysis of ammonium metatungstate, suitable analytical items and methods should be selected according to actual needs.
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