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cool in a desiccator and reweigh to establish the percentage water content. This should be < 5%
Acid Titration Testing (ATT)
Reliable testing to quantify the presence of adulterants or degradation products requires sophisticated testing. A useful titration test can be carried out at home but careful attention to detail is essential to ensure an accurate result. The method involves accurately weighing out a small sample of powder (~200mg +/- 0.5mg), drying in an oven at 1000
C to determine
the presence of any significant amount of water, dissolving in distilled water and then titrating with 0.1N hydrochloric acid, using methyl orange as an indicator.
A detailed step-by-step account of this process has been provided to Exit by ‘htveld’and is available on the ‘Prime Posts’ section of the Exit Forum (or see Tab). http://bit.ly/HGv8tH