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GB/T 10338-2008 English PDF

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GB/T 10338-2008: Pulps -- Determination of carboxyl content
Status: Valid

GB/T 10338: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 10338-2008English189 Add to Cart 3 days [Need to translate] Pulps -- Determination of carboxyl content Valid GB/T 10338-2008
GB/T 10338-1989English199 Add to Cart 2 days [Need to translate] Pulps--Determination of carboxyl content Obsolete GB/T 10338-1989

PDF similar to GB/T 10338-2008


Standard similar to GB/T 10338-2008

GB/T 7979   GB/T 12914   GB/T 8942   GB/T 10339   GB/T 10340   GB/T 10337   

Basic data

Standard ID GB/T 10338-2008 (GB/T10338-2008)
Description (Translated English) Pulps -- Determination of carboxyl content
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard Y30
Classification of International Standard 85-010
Word Count Estimation 8,840
Date of Issue 2008-08-19
Date of Implementation 2009-05-01
Older Standard (superseded by this standard) GB/T 10338-1989
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 exchange of calcium ions and EDTA volumetric method for the determination of the method to determine the pulp carboxyl content. This standard applies to bleached and unbleached pulp slurry carboxyl content determination.

GB/T 10338-2008: Pulps -- Determination of carboxyl content

---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 carboxyl content ICS 85-010 Y30 National Standards of People's Republic of China Replacing GB/T 10338-1989 Determination of carboxyl group content of the pulp 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 replaces GB/T 10338-1989 "Pulp hydroxyl content determination." This standard compared with GB/T 10338-1989, the main changes are as follows. --- Increasing the foreword; --- Increased by principle, reaction type, quality assurance and control, test report chapter (3,4,10,11 this edition); --- Refers to the standard is amended as normative references (1989 edition Chapter 2; Chapter 2 of this edition), an increase of references, and Other wording has been modified; --- According to GB/T 20001.4-2001 requirements, modify the contents of reagent preparation (1989 Edition Chapter 3; Chapter 5 of this edition); --- Modify the contents of the instrument, increasing the wet slurry dissociation unit (1989 edition, Chapter 4; Chapter 6 of this edition); --- Modify the sample preparation, the abolition of dry pulp grinding process is dissociation (1989 edition Chapter 5; Chapter 7 of this edition); --- Modify the contents of the test procedure, the test process is divided into five parts, modifying the fiber dissociation (1989 edition, Chapter 6; Chapter 8 of this edition); --- Modify the presentation of the results to improve the formula (1989 edition, Chapter 7; Chapter 9 of this edition); --- Modify the EDTA concentration calibration method, increased reagent, changing the amount of reagent during the test, a modified accordingly The formula (1989 edition Appendix A; this edition of Appendix A). Appendix A of this standard is a normative appendix. 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. People's Republic of China SZCIQ, China Pulp and Paper Research Institute. The main drafters of this standard. Xu Rong, Jiang Fan, Guhao Fei, Liu Yi, Yang left the military. This standard replaces the standards previously issued as follows. --- GB/T 10338-1989. This standard by the National Standardization Technical Committee is responsible for interpreting the paper industry. Determination of carboxyl group content of the pulp

1 Scope

This standard specifies the exchange of calcium ions and EDTA volumetric method for the determination of the pulp is determined carboxyl content. This standard applies to bleached and unbleached pulp carboxyl content determination.

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) Preparation of GB/T 601 chemical reagent standard titration solution GB/T 740 pulp samples taken (GB/T 740-2003, ISO 7213. 1981, IDT) GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD) ISO 5263-1 Pulp Laboratory wet solution from Part 1. chemical pulp dissociation ISO 5263-2 wet pulp laboratory dissociation Part 2. mechanical pulp dissociation (20 ℃) ISO 5263-3 wet pulp laboratory dissociation Part 3. mechanical pulp dissociation (≥85 ℃) Principle 3 Calcium solution through a filter cake made of pulp fibers, calcium ions react with the carboxyl groups in the fibers, calcium EDTA titration before and after filtration Solution, the consumption of calcium ions was measured, to calculate the cation exchange capacity of the fiber, thereby determining the carboxyl group content of the pulp.

4 Scheme

4.1 calcium ion reaction with a carboxyl reactive Ca2 ++ 2R-COOH = Ca (RCOO) 2 + 2H + The calcium ions through the cake fibers, and the fiber portion of the calcium ions react carboxyl groups. 4.2 solution of the free calcium ions and EDTA titration ion complexation reaction Ca2 ++ H2Y2- = 2H ++ CaY2- The calcium ion complexation with EDTA.

5 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity. 5.1 Mg2 + -EDTA solution, dissolving 0.5g disodium ethylenediaminetetraacetate (EDTA disodium salt) (Na2H2Y · 2H2O) and 0.0125g Magnesium chloride (MgCl2 · 6H2O) in 1000mL of water. The solution was stored in a polyethylene plastic bottle (concentration calibration see Appendix A). 5.2 saturated solution of calcium hydroxide, Weigh 0.5g of calcium hydroxide Ca (OH) 2, was dissolved in 100mL of water, and filtered to obtain calcium hydroxide saturated solution. 5.3 stock solution of calcium Weigh 1.58g of anhydrous calcium acetate, dissolved in water, the volume to 100 mL, the solution concentration of approximately Ba [Ca (C2H3O2) 2] ≈0.1mol/L. When the solution appears cloudy, precipitation, color changes and other phenomena, should be re-prepared. 5.4 Calcium working solution with a pipette, take 1.7mL calcium stock solution (5.3) water volume to 1L, this concentration of approximately

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