Determination Method of Ammonium Content in Ammonium Metatungstate
The ammonium (NH4+) content in ammonium metatungstate (AMT) is typically determined using the distillation-titration method. The specific procedure is as follows:
1. Dissolve the AMT sample and add a strong base (e.g., NaOH), then heat the solution to release ammonia gas (NH3).
2. Absorb the released ammonia gas using an acidic solution (e.g., H2SO4), then titrate with a standard base solution.
This method is simple and practical, achieving an accuracy of up to 0.1%, making it a standard approach for industrial testing.
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