ASTM D 778 – 97 International standard

Standard Test Methods for Hydrogen Ion Concentration (pH) of Paper Extracts (HotExtraction and Cold-Extraction Procedures)1

This trendy is issued under the fixed designation d 778; the quantity immediately following the designation suggests the 12 months of original adoption or, within the case of revision, the yr of ultimate revision. A number of in parentheses indicates the 12 months of closing reapproval. A superscript epsilon (e) indicates an article change since the last revision or reapproval.

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