WATER-SOLUBLE SULFATES IN PULP AND PAPER

• Method is for the volumetric determination of water-extractable sulfate in pulp or paper.
• The method is suitable for sulfate content from 0.01% up to 1%. It can be modified to extend this range also.
• This method does not measure total sulfur .
• It does not designed for the analysis of papers containing fillers composed of sulfides, sulfites, or sulfates .
• Sulfites and thiosulfates do affect results of the test.
• The sulfate content of rosin sized paper is important as an indicator of alum carried with the wet sheet.

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