High density tungsten trioxide refers to the tungsten trioxide powder with higher density than common WO3 powder. It is applied for somewhere requires high density. Tungsten trioxide can be prepared from tungsten concentrate. The main methods to measure the content of tungsten trioxide in tungsten mine include gravimetric, volumetric, colorimetry, polarography, and atomic absorption spectrometry method, etc.
In general, gravimetric and volumetric methods are suitable for the high levels of tungsten content. For the low level of tungsten content, colorimetry, polarography and atomic absorption spectrometry method are supposed to be better.
Ammonium Tungstate Ignition Gravimetric Method
It is commonly used method for the determination of tungsten trioxide. The process includes sample selection, sample crushing, sample acquisition, sample weighting test. Dissolve, dry and burn the sample. There are also further experiments steps. Adopt the amount of tungsten trioxide as abscissa and the absorbance as the vertical axis to draw the working curve to obtain the content of tungsten trioxide.
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