ASTM-D778 2002

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D778-97(2002) Standard Test Methods for Hydrogen Ion Concentration (pH) of Paper Extracts (Hot- Extraction and Cold-Extraction Procedures)

Published By	Publication Date	Number of Pages
ASTM	2002	4

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Category: ASTM

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Description

ASTM D778-97-Reapproved2002

Historical Standard: Standard Test Methods for Hydrogen Ion Concentration (pH) of Paper Extracts (Hot- Extraction and Cold-Extraction Procedures)

ASTM D778

Scope

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:

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.

Keywords

cold extraction; hot extraction; industrial paper; paper; paper acidity; paper aging; paper alkalinity; pH; printing papers; writing papers

ICS Code

ICS Number Code 85.060 (Paper and board)

DOI: 10.1520/D0778-97R02

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Test Methods Significance and Use Apparatus
2	Reagents Sampling Test Specimen Calibration Procedure Interpretation of Results
3	Report Precision and Bias
4	Keywords REFERENCES

Additional information

	Section
Test Method B—pH of Paper (Unfiltered Extract) After Extraction for 1 h in Boiling Water	11.2
Test Method A—pH of Paper (Unfiltered Extract) After Extraction for 1 h in Cold (25 ± 5°C) Water	11.1