2240709

TAPPI T 428 om-21

Hot Water Extractable Acidity or Alkalinity of Paper

standard by Technical Association of the Pulp and Paper Industry , 11/01/2021

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Full Description

This method, based on the work of Kohler and Hall (1), measures the titratable acidity or alkalinity (end point at pH 7.0) of an aqueous extract of paper (filtered and extracted by boiling water for 1 h). It specifies one extraction and so does not measure the total acidity or alkalinity of paper, for which exhaustive extraction is required.

It may be applied to writing, printing, and sized industrial paper but is not intended for testing electrical insulating papers. 

NOTE 1: This method measures the pH of the bulk extract as prepared in the method, and as such, measures the combined acidity and alkalinity of the base paper and any added fillers or coating materials.

 

Product Details

Published:
11/01/2021
ANSI:
ANSI Approved
Number of Pages:
5
File Size:
1 file , 260 KB
Note:
This product is unavailable in Ukraine, Russia, Belarus
 

Document History

  1. TAPPI T 428 om-21

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    Hot Water Extractable Acidity or Alkalinity of Paper

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  2. TAPPI T 428 om-13


    Hot Water Extractable Acidity or Alkalinity of Paper

    • Historical Version

  3. TAPPI T428 om-04


    Hot Water Extractable Acidity or Alkalinity of Paper

    • Historical Version

  4. TAPPI T428


    Hot Water Extractable Acidity or Alkalinity of Paper

    • Historical Version