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4.14 CRYSTALLINITY

4.14 CRYSTALLINITY

      Use the method specified in the individual monograph.

Method I

      To prepare the sample for examination, mount a few particles in liquid paraffin on a clean glass slide. Examine the sample by means of a polarizing microscope. The particles reveal the phenomena of birefringence and extinction positions on revolving the microscope stage.

Method II 

      To prepare the sample for examination, mount a few particles in liquid paraffin on a clean glass slide, add 1 drop of ethanol, and allow to react for about 30 seconds. Then proceed as directed in Method I.

APPENDICES • 4.14 CRYSTALLINITY
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หมายเหตุ / Note : TP II 2011 PAGE 436