ISO 21436 is an international standard on the determination of lignin content in wood pulp.
ISO 21436 is applicable to an unbleached, bleached, and semi-bleached wood pulp with a lignin content above 1 %. It is not intended for fully bleached chemical pulp, because the lignin content in these pulps is too low to be determined accurately.
ISO 21436 describes the determination of acetone-soluble matter in pulp. It is applicable to all types of pulp.
ISO 21436 on the determination of lignin content in wood pulp is useful for:
The main objective of measuring lignin in pulp is to assess the effect of a particular pulping or bleaching process on the degree of delignification.
ISO 21436 provides you with an acid hydrolysis method to determine lignin content and acetone-soluble matter in wood pulp.
ISO 21436 helps you to give your paper products a suitable texture and whiteness by enabling you to determine the lignin content in wood pulps.
ISO 21436