BS EN ISO 638-1:2021 pdf download.Paper, board, pulps and cellulosic nanomaterials – Determination of dry matter content by oven-drying method Part 1: Materials in solid form.
This document specifies an oven-drying method for the determination of the dry matter content in paper, board, pulp and cellulosic nanomaterials in solid form, which all can be produced from virgin and br recycled materials.
It is also applicable to the determination of the dry matter content of paper and board for recycling.
The procedure is applicable to paper. board, and pulp and cellulosic nanomaterials 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 pulp, paper, and board and cellulosic nanomaterial samples taken for chemical and physical tests in the laboratory, when a concurrent determination of dry matter content is required.
This method is not applicable to the determination of the dry matter content of slush pulp or to the determination of the saleable mass of pulp lots.
NOTE I ISO 638-2111 specifies an oven-drying method for the determination of the dry matter content of suspensions of cellulosic nanomaterials. ISO 287121 specifies the determination of the moisture content of a lot of paper and hoard; L5.Q41191i1 specifies the determination of stock concentration of pulps; ISO 801 (all parts)141 specifies the determinahon of the 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 are removed prior to measuring the dry matter content e.g. by washing or dialysis, taking care to retain all cellulosic material; in cases where the sample is filterable without loss of cellulosic solids, ISO 4119131 can be used to determine the stock consistency (content of cellulosic material in solid form)
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 186. Paper and board — Sampling to determine average quality
ISO 7213, Pulps — Sampling for testing
EN 17085, Paper and board — Sampling procedures for paper and board for recycling
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for USC in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— I EC Electroped ia: available at http://www.electropedia.org/
3.1 cellulosic nanomaterial CNM material composed predominantly of cellulose, with any external dimension in the nanoscale (3) Note ito entry: The terms nanocellulose (NC) and cellulose nanomaterial (CNM) are synonymous with cellulosic nanomaterial (CNM).
Note 2 to entry: Some cellulosic nanomaterials can be composed of chemically modified cellulose.
[SOURCE: ISO/TS 20477:2017, 3.3.1, modified — “or a material having internal structure or surface structure in the nanoscale, with the internal structure or surface structure composed predominantly of cellulose” deleted from the definition; ‘cellulose” changed to “cellulosic”; Note 3 to entry deleted]
3.2 constant mass
mass of the test piece determined at the equilibrium condition after drying until the difference between two successive dryings and weighings, separated in time by at least half the initial drying period, does not exceed 0,1 % mass fraction of the test piece before drying
3.3 dry matter content
ratio of the mass of a test piece after drying to constant mass (32) at a temperature of 105 °C ± 2 °C under specified conditions, to its mass before drying
Note 1 to entry: The dry matter content Is usually expressed as a percentage mass fraction.
3.4 moisture content
content of water in paper or board, i.e. the ratio of the loss of mass of a test piece, when dried at a temperature of 105 °C ± 2 °C under specified conditions, to its mass at the time of sampling
Note ito entry: The moisture content is normally expressed as a percentage mass fraction. [SOURCE: ISO 287:2017, 3.1, modified — “at a temperature of 105 °C ± 2 °C” added]
3.5 nanoscale
length range approximately from 1 nm to 100 nm
Note 1 to entry: Properties that are not extrapolations from larger sizes are predominately exhibited in this length range.BS EN ISO 638-1 pdf free download.