GB/T 742-2018 English PDF

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GB/T 742-2018: Fibrous raw material, pulp, paper and board -- Determination of residue (ash) on ignition at 575℃ and 900℃
Status: Valid

GB/T 742: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 742-2018	199	Add to Cart	3 days	Fibrous raw material, pulp, paper and board -- Determination of residue (ash) on ignition at 575℃ and 900℃	Valid
GB/T 742-2008	279	Add to Cart	3 days	Fibrous raw material, Pulp, Paper and board -- Determination of ash	Obsolete
GB/T 742-2003	279	Add to Cart	3 days	Paper, board and pulp -- Determination of residue (ash) on ignition at 900 Celsius	Obsolete
GB/T 742-1989	199	Add to Cart	2 days	Pulps--Determination of ash	Obsolete

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Basic data

Standard ID: GB/T 742-2018 (GB/T742-2018)
Description (Translated English): Fibrous raw material, pulp, paper and board -- Determination of residue (ash) on ignition at 575�� and 900��
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: Y30
Classification of International Standard: 85.010
Word Count Estimation: 10,190
Date of Issue: 2018-12-28
Date of Implementation: 2019-07-01
Older Standard (superseded by this standard): GB/T 742-2008
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 742-2018: Fibrous raw material, pulp, paper and board -- Determination of residue (ash) on ignition at 575℃ and 900℃

---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.
Fibrous raw material, pulp, paper and board--Determination of residue(ash) on ignition at 575°C and 900°C ICS 85.010 Y30 National Standards of People's Republic of China Replace GB/T 742-2008 Papermaking raw materials, pulp, paper and cardboard burning residues Determination of matter (ash) (575 ° C and 900 ° C) [ISO 2144.2015, Paper, boardandpulps-Determinationof Residue(ash)onignitionat900°C, MOD] Published on.2018-12-28 2019-07-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 742-2008 "Determination of ash of papermaking, pulp, paper and board", this standard and GB/T 742- Compared with.2008, the main changes are as follows. --- The name of this standard was changed from "Determination of ash of papermaking, pulp, paper and paperboard" to "paper raw materials, pulp, paper and cardboard burning" Determination of burning residue (ash) (575 ° C and 900 ° C)"; --- Added terms and definitions (see Chapter 3); ---Modified principles (see Chapter 4, Chapter 3 of the.2008 edition); --- Revised the test procedure and increased the requirements for the specimen (see Chapter 8, Chapter 7 of the.2008 edition); --- The calculation of the results is separately set and the requirements for the results of the two tests are modified (see Chapter 9, Chapter 7 of the.2008 edition); --- Modified Appendix A and Appendix B. This standard uses the redrafting method to modify the ISO 2144.2015 paper, paperboard and pulp burning residue (ash) (900 ° C)". This standard has more structural adjustments than ISO 2144.2015. Appendix A lists the standards and ISO 2144.2015 chapters. The bar number comparison checklist. This standard has a large technical difference compared with ISO 2144.2015. Appendix B gives the standard and ISO 2144.2015 technology. A list of surgical differences and their causes. This standard has made the following editorial changes. --- Modified the standard name; --- Removed the informative Appendix A "Precision" of ISO 2144.2015. Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents. This standard was proposed by the China Light Industry Association. This standard is under the jurisdiction of the National Paper Industry Standardization Technical Committee (SAC/TC141). This standard was drafted. Sichuan Paper Product Quality Supervision and Inspection Center, Suichang Original Standardization Office Co., Ltd., Zhejiang Kane Special Paper Co., Ltd., China Pulp and Paper Research Institute Co., Ltd., National Paper Quality Supervision and Inspection Center. The main drafters of this standard. Wang Huajun, Zhao Ju, Yu Jian, Wu Minmin, Chen Wanping, Yuan Rong, Cai Mingfang, Li Dafang. The previous versions of the standards replaced by this standard are. ---GB 742-1966, GB 742-1979, GB/T 742-1989, GB/T 742-2008; ---GB/T 2677.3-1981, GB/T 2677.3-1993. Papermaking raw materials, pulp, paper and cardboard burning residues Determination of matter (ash) (575 ° C and 900 ° C)

1 Scope

This standard specifies the method for determining the burning residue (ash) of papermaking materials, pulp, paper and paperboard at 575 ° C and 900 ° C. This standard applies to the determination of various papermaking materials, pulp, paper and cardboard burning residues (ash).

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 450 paper and paperboard samples taken and the longitudinal, lateral and frontal measurements of the samples (GB/T 450-2008, ISO 186. 2002, MOD) GB/T 462 Determination of moisture in paper, paperboard and pulp analysis samples (GB/T 462-2008, ISO 287.1985, ISO 638. 1978, MOD) GB/T 740 pulp sample (GB/T 740-2003, ISO 7213.1981, IDT) GB/T 2677.1 Determination of samples for papermaking raw materials GB/T 2677.2 Determination of moisture content of papermaking raw materials

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Burning residue, residentonignition The papermaking material, pulp, paper and paperboard samples are charred and then burned in a high temperature furnace at (575 ± 25) °C or (900 ± 25) °C. The ratio of the mass to the mass of the original dry sample, expressed as a percentage. Note. Burning residues are referred to as "ash" in earlier versions of this standard.

4 Principle

Put a certain amount of sample into the crucible, carbonize it in an electric furnace, and burn it in a high temperature furnace at a temperature of (575±25) °C or (900±25) °C. The difference between the total mass of the residue and the crucible after burning minus the mass of the crucible is the mass of the residue.

5 reagent

5.1 95% ethanol reagent, analytically pure. 5.2 Magnesium acetate (C4H6O4Mg·4H2O), analytically pure. 5.3 Magnesium Acetate Ethanol Solution. Dissolve 4.05 g of magnesium acetate (5.2) in 50 mL of distilled water and dilute to 100 mL with 95% ethanol (5.1). ......

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