Phosphate with AgNO3
              
              
                Transmitted Off 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 potassium
                monobasic phosphate.