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Photographic gallery.  Thousands of particles under the microscope.

Phosphate with AgNO3

Transmitted Crossed Circular Polarized Light Illumination

The presence of phosphate ions in solution can be determined by the addition of a small droplett of 10% silver nitrate solution at the edge of the test solution (See Chamot and Mason, CHEMICAL MICROSCOPY, Vol II, page 317,337-8). This example was created by adding the silver nitrate test solution to a dilute solution of an unknown precipitate removed from a concentated sodium hypochlorite solution and dissolved in dilute nitric acid.