The testing of Ammonium Metatungstate usually involves several aspects to ensure that its quality and purity meet the relevant standards and requirements. The following are some of the major aspects of Ammonium Metatungstate testing:
Appearance test
Observe the color of Ammonium Metatungstate, it should be white or slightly yellow crystalline powder. Check its crystallization state, it should be uniform crystal particles.
Chemical analysis
Determination of purity
The tungsten content of Ammonium Metatungstate is determined chemically to determine its purity. This usually involves dissolving the sample and determining the tungsten content by methods such as redox titration, gravimetric or spectroscopic methods.
Determination of impurity content
The content of impurities that may be present in a sample, such as phosphorus, silicon, aluminum, iron, calcium and magnesium, is examined. These impurities may be determined by methods such as atomic absorption spectrometry, inductively coupled plasma mass spectrometry (ICP-MS) or ion chromatography.
pH Determination
The pH of the solution is determined to ensure the stability of Ammonium Metatungstate under specific conditions.
Physical property test
Solubility
To test the solubility of Ammonium Metatungstate in different solvents to determine its solubility property.
Density
To determine the density of Ammonium Metatungstate to evaluate its physical properties.
Thermal stability
To determine the stability of Ammonium Metatungstate at high temperature by methods such as thermogravimetric analysis (TGA) or differential scanning calorimetry (DSC).
Particle size analysis
Determine the particle size distribution of Ammonium Metatungstate using particle size analyzer to determine its particle size and its distribution range.
Moisture Content Determination
The moisture content in Ammonium Metatungstate is determined to ensure that it dries to a standard. This is usually done by Karl Fischer method or thermogravimetric analysis.
Heavy metal and toxic element testing
Use atomic absorption spectrometry, inductively coupled plasma mass spectrometry and other methods to determine the content of heavy metals and toxic elements that may be present in Ammonium Metatungstate, such as lead, mercury, arsenic and so on.
Infrared spectral analysis
Analyze the molecular structure of Ammonium Metatungstate by infrared spectrometer to verify its chemical composition.
X-ray Diffraction Analysis
Analyze the crystal structure of Ammonium Metatungstate by X-ray diffractometer to further verify its purity and crystallinity.
The above inspection items can be adjusted according to specific application requirements and industry standards. When conducting the tests, relevant safety operation procedures and laboratory norms should be strictly observed to ensure the accuracy and reliability of the test results.
More details of ammonium metatungstate product, please visit website: http://ammonium-metatungstate.com/
Please contact CHINATUNGSTEN for inquiry and order of ammonium metatungstate:
Email: sales@chinatungsten.com
Tel.: 86 592 5129595
