GB/T 12033: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12033-2025 | English | RFQ |
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3 days [Need to translate]
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(Raw materials and pulps - Determination of carbohydrate composition)
| Valid |
GB/T 12033-2025
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| GB/T 12033-2008 | English | 209 |
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3 days [Need to translate]
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Test methods of colloidal graphite for kinescope
| Valid |
GB/T 12033-2008
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| GB/T 12033-1989 | English | 239 |
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2 days [Need to translate]
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Paper and board--Preparation a offset print for test gloss
| Obsolete |
GB/T 12033-1989
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Basic data | Standard ID | GB/T 12033-2025 (GB/T12033-2025) | | Description (Translated English) | (Raw materials and pulps - Determination of carbohydrate composition) | | Sector / Industry | National Standard (Recommended) | | Date of Implementation | 2026-05-01 | | Older Standard (superseded by this standard) | GB/T 12033-2008 | | Issuing agency(ies) | State Administration for Market Regulation; Standardization Administration of China | GB/T 12033-2008: Test methods of colloidal graphite for kinescope---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.
Test methods of colloidal graphite for kinescope
ICS 85-010
Y30
National Standards of People's Republic of China
Replacing GB/T 12033-1989
Paper and pulp raw sugar component
Determination by gas chromatography
Posted 2008-08-19
2009-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is 12033-1989 "Paper and pulp raw sugar components in Gas Chromatography," the revision of GB/T .
This standard replaces GB/T 12033-1989.
This standard compared with GB/T 12033-1989 main changes are as follows.
--- Increasing the foreword;
--- The subject matter and scope of application to modify the scope of, and modify its contents (Chapter 1 of the 1989 edition);
--- Refers to the standard modified to Normative documents and other relevant changes in the wording of the corresponding (1989 edition Chapter 2; present
The first edition chapter 2), to increase the standard of reference;
--- Modified principle (1989 edition Chapter 3, Chapter 3 of this edition);
--- Reagent amended as reagents and materials, modify the requirements of reagents, increase the reference reagent (1989 edition, Chapter 4; Excerpts
Chapter 4);
--- Modify the instrument requirements, increasing the reference instrument (1989 edition Chapter 5, Chapter 5 of this edition);
--- Modify the test procedure, the test process is divided into six parts, and the individual steps to be modified (1989 edition, Chapter 7, edition
Chapter 7);
--- Modify the formulas and results presentation (1989 version of Chapter 8; Chapter 8 of this edition);
--- Increasing the lower limit of detection and recovery (Chapter 9 of this edition);
--- Remove the original Appendices A and B, the contents of which in the test procedure described in Appendix B to modify the original chromatographic conditions, change filling
The column was capillary column;
--- Adding new Appendices A and B;
--- Remove the additional instructions.
Appendix A of this standard and Appendix B is an informative annex.
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. CIQ Shenzhen, China Pulp and Paper Research Institute.
The main drafters of this standard. Left Yang Jun, Wang Chengyun, Xu Rong, Guhao Fei, Li Lixia, Zhang Ya, Fan Xiurong, Liu Min.
This standard replaces the standards previously issued as follows.
--- GB/T 12033-1989.
This standard by the National Standardization Technical Committee is responsible for interpreting the paper industry.
Paper and pulp raw sugar component
Determination by gas chromatography
1 Scope
This standard specifies the gas chromatographic method pulp and paper-making material in the main carbohydrate component.
This standard applies to the determination of a variety of raw materials and a variety of paper pulp carbohydrate component.
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, ISO 638.
1978, MOD)
Principle 3
With sulfuric acid at high temperature and pressure conditions, the papermaking raw materials or pulp hydrolysis of cellulose and hemicellulose into simple sugars solution to lead carbonate
After neutralization using sodium borohydride reduction, to make it a sugar alcohol. In high temperature conditions, were derivatized with acetic anhydride to form a volatile derivative
It was then analyzed by gas chromatography, internal standard.
4 Reagents and materials
Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity.
4.1 Lead hydroxycarbonate [Pb (OH) 2 ยท 2PbCO3].
4.2 sodium borohydride (NaBH4).
4.3 acetic acid (CH3COOH). a concentration of 36%.
4.4 dichloromethane (CH2Cl2). chromatography.
4.5 absolute ethanol (C2H5OH).
Acetic anhydride 4.6 (C4H6O3).
4.7 butyl acetate (C6H12O2).
4.8 sulfuric acid solution. formulated with distilled water into a superior grade of pure sulfuric acid concentration of 72%.
4.9 hydrochloric acid solution. concentration of 1mol/L.
4.10 Internal standard. standard inositol (C6H12O6), a purity of greater than 98.5%.
4.11 standard glucose (C6H12O6). purity of greater than 98.5%.
4.12 galactose standard (C6H12O6). purity of greater than 98.5%.
4.13 mannose standard (C6H12O6). purity of greater than 98.5%.
4.14 standard xylose (C5H10O5). purity of greater than 98.5%.
4.15 arabinose standard (C5H10O5). purity of greater than 98.5%.
4.16 internal standard solution. Accurately weigh an appropriate amount of internal standard (4.10), using distilled water as the internal standard solution of the desired concentration.
4.17 mixed standard solution. Accurately weigh the right amount of glucose standard (4.11), galactose standard (4.12), mannose standard
(4.13), xylose standard (4.14), arabinose standard (4.15) and the internal standard (4.10), mixed with distilled water to the desired concentration
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