GB/T 22902-2025 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 22902-2025	RFQ	ASK	3 days	Pulps - Determination of acetone-soluble matter	Valid
GB/T 22902-2008	139	Add to Cart	3 days	Pulps -- Determination of acetone-soluble matter	Valid

Basic data

Standard ID: GB/T 22902-2025 (GB/T22902-2025)
Description (Translated English): Pulps - Determination of acetone-soluble matter
Sector / Industry: National Standard (Recommended)
Date of Implementation: 2026-03-01
Older Standard (superseded by this standard): GB/T 22902-2008

GB/T 22902-2008: Pulps -- Determination of acetone-soluble matter

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Pulps. Determination of acetone-soluble matter ICS 85-010 Y30 National Standards of People's Republic of China Pulps - Determination of acetone-soluble matter (ISO 14453.1997, MOD) Posted 2008-12-30 2009-09-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This revised standard adopts ISO 14453.1997 "Pulp Determination of acetone soluble matter." This standard and ISO 14453.1997 as compared to the main differences are as follows. --- Normative references to international standards in the ISO standard document references into its corresponding national standard, GB/T 462 paper, Board and pulp - Determination of water sample (GB/T 462-2008; ISO 287. 1985, MOD; ISO 638. 1978, MOD); --- Instrument electronic balance and increase the oven blast chapter; --- Remove the precision of a chapter. The standard proposed by China National Light Industry Council. This standard by the National Standardization Technical Committee of the paper industry. This standard was drafted. Suichang Xingchang Paper Co., Ltd., specialty paper and paper products in Zhejiang Province Quality Inspection Center of China Pulp and Paper Institute. The main drafters of this standard. Zheng Jian, Zhan Yanlin, are applied. Pulps - Determination of acetone-soluble matter

1 Scope

This standard specifies the method for determining pulp acetone-soluble substances. This standard applies to all except the pulp waste paper pulp. The detection limit is 0.05%.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 462 paper, board and pulp - Determination of water sample (GB/T 462-2008; ISO 287. 1985, MOD; ISO 638. 1978, MOD) GB/T 740 pulp samples taken (GB/T 740-2003, ISO 7213.1991, IDT)

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 According to the method specified in this standard, the material with acetone extraction of the sample from the plasma, namely acetone solubles. Principle 4 In accordance with the standard method, Soxhlet extractor, extracted with acetone pulp samples. Continuous extraction 3h ~ 4h, and to ensure that pumping during extraction Mention vented least 16 times, the solvent was evaporated, the residue was pumped at 105 ℃ presented on drying 2h, and then weighed. By acetone extractables Absolute dry mass ratio of sample mass, determined the content of the acetone soluble matter.

5 Reagents

Warning. Acetone is flammable, away from fire, do not use a gas heater, and strictly follow the safety rules and regulations. Acetone (CH3COCH3), AR.

6 Instruments

6.1 Soxhlet Having a frosted glass connections and 300mL ~ 500mL flask of a Soxhlet extractor, and a water-cooled condenser. 6.2 cellulose extraction thimble Subject to extraction with acetone to clean. 6.3 Glass fiber Subject to extraction with acetone to clean. 6.4 Heater Extractor dedicated water bath or similar heating device. ......

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