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ISO 6439:1990 Water quality - Determination of phenol index - 4-Aminoantipyrine spectrometric methods after distillation
standard by International Organization for Standardization, 05/01/1990
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Gives procedures for drinking waters, surface waters, brines (saline waters), domestic waters and industrial waters. After a preliminary distillation the test sample are analysed according to specific application by direct colorimetric method and by chloroform extraction method.