Purity determination of Ammonium Metatungstate is a process that involves multiple steps and parameters. Below is a brief step-by-step and point-by-point representation of the purity determination of Ammonium Metatungstate based on the information in the referenced article in a clear, point-by-point manner:
- Preparation
Sample Preparation
Ensure that the Ammonium Metatungstate sample is dry and homogeneous.
Equipment Preparation
Prepare the required chemical analyzing instruments and reagents, such as spectrophotometer, atomic absorption spectrometer and electronic balance.
- Determination of tungsten dioxide content
Methods
Determine the content of tungsten dioxide in the sample by chemical analysis method.
Meaning
Tungsten dioxide is the main component of ammonium metatungstate, and its content directly reflects the purity of ammonium metatungstate.
- Determination of impurity content
Purpose: To detect the possible impurity elements in the sample, such as phosphorus, silicon, aluminum, iron, calcium, magnesium and so on.
Method:
Determination of the content of specific impurity elements using Flame Atomic Absorption Spectrometry (e.g. AA-1800).
Multi-element analysis using Inductively Coupled Plasma Emission Spectroscopy (e.g. ICP-5000).
Importance: the lower the impurity content, the higher the purity of ammonium metatungstate.
- Determination of water insoluble matter content
Method: According to GB/T 23368.1-2009 standard, use weighing method to determine the content of water insoluble matter.
Steps:
Dissolve the test material with water and filter to separate its insoluble matter.
The mass value after drying is the amount of water insoluble matter.
Range: the determination range is 0.0025% to 2%.
- Determination of other parameters
Other parameters such as the amount of zinc, pH value, etc. can be determined as required.
- Calculation of purity
The purity of ammonium metatungstate is calculated through the data of tungsten dioxide content, impurity content and water-insoluble matter content obtained from the determination, combined with the relevant chemical calculation formula or standard.
- Record and report
Record all the measurement data, calculation process and results in detail, and prepare the purity determination report.
Precautions
When performing the purity determination, make sure the operation is accurate and standardized to avoid introducing errors.
The reagents and instruments used should meet the relevant standards and requirements.
Safety should be observed during the determination to avoid accidents.
The above steps and points provide a basic framework, but the specific determination methods and details may vary according to different laboratories and standards. Therefore, in practice, adjustments and additions should be made according to the specific situation.
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
