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These test methods cover two procedures for determination of the hydrogen ion concentration, expressed in terms of pH, of an aqueous extract of paper.
Formerly under the jurisdiction of Committee D06 on Paper and Paper Products, this test method was withdrawn in February 2010 because an equivalent TAPPI publication exists.
1.1 These test methods cover two procedures for determination of the hydrogen ion concentration, expressed in terms of pH, of an aqueous extract of paper.
1.2 These test methods may be applied to writing, printing, and sized industrial papers.
1.3 These test methods are not intended to be used for determination of pH of insulating papers, for that see Test Methods D 202
1.4 The test methods appear as follows:
|Test Method A—pH of Paper (Unfiltered Extract) After|
Extraction for 1 h in Cold (25 ± 5°C) Water
|Test Method B—pH of Paper (Unfiltered Extract) After|
Extraction for 1 h in Boiling Water
1.5 Specifications may be based on Test Method A or Test Method B, or both.
1.6 Where a specification or specific instructions or agreement to use only one of these test methods is absent, determine pH using both procedures, and interpret results based on Section 12.
1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D202 Test Methods for Sampling and Testing Untreated Paper Used for Electrical Insulation
D585 Practice for Sampling and Accepting a Single Lot of Paper, Paperboard, Fiberboard, and Related Product
D1193 Specification for Reagent Water
D1293 Test Methods for pH of Water
D1968 Terminology Relating to Paper and Paper Products
E70 Test Method for pH of Aqueous Solutions With the Glass Electrode
E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM D778-97(2007), Standard Test Methods for Hydrogen Ion Concentration (pH) of Paper Extracts (Hot-Extraction and Cold-Extraction Procedures) (Withdrawn 2010), ASTM International, West Conshohocken, PA, 2007, www.astm.orgBack to Top