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Photographic gallery.  Thousands of particles under the microscope.
Microchrystal Test for Ammonium

Ammonium By Chloroplatinic Acid

These are crystals of ammonium chloroplatinate (NH4)2PtCl6 formed in a hanging drop of chloroplatinic acid over a test material containing the ammonium ion or for which a predicted reaction would release ammonium hydroxide. In this case the reaction is urease with urea. This is a good test to detect the presence of urine.

Transmitted Off Crossed Polarized Light Illumination


Significance in the Environment:

Characteristic Features:

Associated Particles:


Chamot, Emile Monnin and Clyde Walter Mason, HANDBOOK OF CHEMICAL MICROSCOPY, Volume II, pp. 74-5, 1940.