DS/EN ISO 638-2:2021

Paper, board, pulps and cellulosic nanomaterials – Determination of dry matter content by oven-drying method – Part 2: Suspensions of cellulosic nanomaterials (ISO 638-2:2021)

Under revision:
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This document specifies an oven-drying method for the determination of the dry matter content
in suspensions of cellulosic nanomaterials. The procedure is applicable to cellulosic nanomaterial
suspensions which do not contain any appreciable quantities of materials other than water that are
volatile at the temperature of 105 °C ± 2 °C. It is used, for example, in the case of cellulosic nanomaterial
suspensions samples taken for chemical and physical tests in the laboratory, when a concurrent
determination of dry matter content is required.
NOTE 1 – ISO 638-1 [1] specifies the total dry matter content of paper, board, paper and board for recycling
and cellulosic nanomaterials in solid form; ISO 287 [2] specifies the determination of moisture content of a lot of
paper and board; ISO 4119 [3] specifies the determination of stock concentration of aqueous pulp suspensions;
ISO 801 (all parts) [4] specifies the determination of saleable mass in lots.
NOTE 2 – This document determines the total dry matter content of the sample, including any dissolved solids.
If only the cellulosic material content free of dissolved solids is desired, dissolved solids should be removed prior
to measuring the dry matter content e.g. by washing or dialysis, taking care to retain all cellulosic material.

Under revision

Number of pages: 22

Published: 2021-05-26

Date of approval: 2021-05-25

International relationships : EN ISO 638-2:2021 IDT ISO 638-2:2021 IDT

ICS: 85.040 - Pulps 85.060 - Paper and board

Item number: M343848



  • CEN/TC 172
  • ISO/TC 6
  • ISO/TC 6/WG 13

Danish committee