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ISO 21436:2020
M00000940
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ISO 21436:2020 Pulps - Determination of lignin content - Acid hydrolysis method
standard by International Organization for Standardization, 12/01/2020
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ISO 21436:2020: The method is applicable to unbleached, bleached and semi-bleached wood pulp with a lignin content above 1 %. It is not generally intended for fully bleached chemical pulp, because the lignin content in these pulps is too low to be determined accurately.