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GB/T 1545-2008: Paper, board and pulp -- Determination of acidity or alkalinity
Status: Valid GB/T 1545: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 1545-2008 | English | 189 |
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Paper, board and pulp -- Determination of acidity or alkalinity
| Valid |
GB/T 1545-2008
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| GB/T 1545.1-2003 | English | 319 |
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Paper, board and pulp -- Determination of acidity or alkalinity
| Obsolete |
GB/T 1545.1-2003
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| GB/T 1545.1-1989 | English | 199 |
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Paper, board and pulp-Determination of acidity or alkalinity
| Obsolete |
GB/T 1545.1-1989
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| GB 1545-1979 | English | RFQ |
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Determination of pH in liquid extraction of pulp, paper and paper board
| Obsolete |
GB 1545-1979
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PDF similar to GB/T 1545-2008
Basic data | Standard ID | GB/T 1545-2008 (GB/T1545-2008) | | Description (Translated English) | Paper, board and pulp -- Determination of acidity or alkalinity | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y30 | | Classification of International Standard | 85-010 | | Word Count Estimation | 8,896 | | Date of Issue | 2008-08-19 | | Date of Implementation | 2009-05-01 | | Older Standard (superseded by this standard) | GB/T 1545.1-2003; GB/T 1545.2-2003 | | Quoted Standard | GB/T 450; GB/T 462; GB/T 601; GB/T 740 | | Adopted Standard | ISO 6588-1981, MOD | | Regulation (derived from) | National Standard Approval Announcement 2008 No.14 (Total No.127) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the paper, paperboard and pulp acidity or alkalinity of aqueous extracts of the two methods titration and pH meter method. This standard titration method for general paper, paperboard and pulp measurement of acidity or alkalinity. Does not apply to paper and paperboard containing alkaline filler or coating. pH meter method is suitable for the electrical conductivity of aqueous extracts over 0. 2mS/m of a variety of paper, paperboard and pulp. | GB/T 1545-2008: Paper, board and pulp -- Determination of acidity or alkalinity---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.
Paper, board and pulp. Determination of acidity or alkalinity
ICS 85-010
Y30
National Standards of People's Republic of China
Replacing GB/T 1545.1-2003, GB/T 1545.2-2003
Paper, paperboard and pulp
Determination of water extract of acidity or alkalinity
(ISO 6588. 1981, Paper, boardandpulps-
DeterminationofpHofaqueousextracts, MOD)
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 revised standard adopts the International Standard ISO 6588. 1986 "Paper, paperboard and pulp - Determination of pH of aqueous extracts."
This standard and ISO 6588. 1986 as compared to the main differences are as follows.
--- Modify the standard name;
--- Increasing the normative references (Chapter 2 of this edition);
--- Remove the meaning;
--- Modify the scope (Chapter 1 of this edition);
--- Increased terms and definitions (Chapter 3 of this edition);
--- Modified principle (Chapter 4 of this edition);
--- Modify the test water is distilled water or purified water equivalent purity (edition 5.1);
--- Preparation ISO 6588 Annex buffer solution was transferred to Chapter 5 of this standard reagent (edition 5.5);
--- An increase of 0.04% phenol red indicator (edition 5.4) in the reagent;
--- Sampling according to GB/T 450, GB/T 740 were measuring the moisture content in accordance with GB/T 462 performed;
--- Test step 8.3, after completion of the extraction, the use of phenol red indicator was titrated with NaOH or H2SO4;
--- Modified test procedure increases the Method A. titration (edition 8.1);
--- Removed appendix.
This standard replaces GB/T 1545.1-2003 "Paper, paperboard and pulp extract water acidity or alkalinity determination", GB/T 1545.2-
2003 "paper, board and pulp - Determination of pH of aqueous extract."
This standard and GB/T 1545.1-2003, GB/T 1545.2-2003 compared to the main changes are as follows.
--- Refers to the standard is amended as normative references (1989 edition Chapter 2; Chapter 2 of this edition), to increase the standard of reference, and
Other wording corresponding change;
--- Increasing the definitional elements (Chapter 3 of this edition);
--- Increasing the introductory phrase and sample processing and reagent moisture measurement unit (Chapter 5 and Chapter 7 of this edition);
--- Modify the contents of the reagent, Added Note (Chapter 5 of this edition);
--- Modified test procedure, increasing the method A, method B (Chapter 8 of this edition);
--- Increase the informative appendix "in this standard with the corresponding ISO 6588. 1986 reg number control" (see Appendix A);
--- Increase the informative appendix "This standard and ISO 6588. 1986 technical differences and their causes" (see Appendix B).
The Standard Appendix A, 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. Product Quality Supervision and Inspection Institute of Henan Province, China Pulp and Paper Research Institute.
The main drafters of this standard. Li, Ruan Jian.
This standard replaces the standards previously issued as follows.
--- GB 1545.1-1979, GB/T 1545.1-1989, GB/T 1545.1-2003;
--- GB 1545.2-1979, GB/T 1545.2-1989, GB/T 1545.2-2003.
This standard by the National Standardization Technical Committee is responsible for interpreting the paper industry.
Paper, paperboard and pulp
Determination of water extract of acidity or alkalinity
1 Scope
This standard specifies two methods of paper, paperboard and pulp water extract of acidity or alkalinity. titration method and pH meter.
This standard titration method for the determination of general paper, paperboard and pulp acidity or alkalinity, do not apply to contain a basic filler or coating
Paper and cardboard. pH meter method is suitable for the electrical conductivity of aqueous extracts over 0.2mS/m variety of paper, board and pulp.
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 450 and take samples to an aspect of paper and paperboard samples, positive and negative determination (GB/T 450-2008, ISO 186.
2002, MOD)
GB/T 462 paper, board and pulp - Determination of water sample (GB/T 462-2008, ISO 287. 1985, ISO 638.
1978, MOD)
Preparation of GB/T 601 chemical reagent standard titration solution
GB/T 740 pulp samples taken (GB/T 740-2003, ISO 7213. 1981, IDT)
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Paper water-soluble substance will change water [H] + and [OH] - the balance to produce excess hydrogen ions. In a particular bar
Lower member, titrated with standard alkaline solution, measured by an excess of [H] + concentration, i.e. the paper acidity.
3.2
Paper water-soluble substance will change water [H] + and [OH] - balance, resulting in excess hydroxide ions. In a special
Under the given conditions, the acidic solution is titrated with a standard, the measured excess of [OH] - concentration, namely paper alkalinity.
Principle 4
Extraction with distilled water samples 1h, then expressed pH or pH of the aqueous extract by titration or pH meter method.
5 Reagents
Unless otherwise indicated, the analysis uses only recognized as analytical grade reagents and distilled or deionized water or equivalent purity of purified water.
5.1 equivalent purity distilled water or purified water, pH value of 6.0 to 7.3. Using a pH meter method used distilled water or equivalent purity purge
Water, press the hot extraction (8.2.1.2) was heated to near boiling and regulations after cooling, water conductivity should not exceed 0.1mS/m.
Note. When is impossible to obtain a predetermined purity of the water, you can use a higher conductivity of water, it should be explained that the conductivity of the water in the test report.
5.2 0.01mol/L sodium hydroxide standard solution.
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