Color Standards
There a color standard, made from dilutions of a Pt-Co solution, described by Dr. A. Hazen in American Chemical Journal, in 1892, adopted in Standard Methods for the Examination of Water and Waste Water, made by APHA, sometimes referred as Pt-Co/Hazen/APHA Colour.
Read more about this topic: American Public Health Association
Famous quotes containing the words color and/or standards:
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