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GB/T 6043-2009 English PDF

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GB/T 6043-2009: Method for determination of pH value of wood
Status: Valid

GB/T 6043: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 6043-2009English139 Add to Cart 3 days [Need to translate] Method for determination of pH value of wood Valid GB/T 6043-2009
GB/T 6043-1999English199 Add to Cart 2 days [Need to translate] Method for determination of pH of wood Obsolete GB/T 6043-1999
GB/T 6043-1985EnglishRFQ ASK 3 days [Need to translate] Method for determination of pH of wood Obsolete GB/T 6043-1985

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Basic data

Standard ID GB/T 6043-2009 (GB/T6043-2009)
Description (Translated English) Method for determination of pH value of wood
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard B60
Classification of International Standard 79.020
Word Count Estimation 6,633
Date of Issue 2009-02-23
Date of Implementation 2009-08-01
Older Standard (superseded by this standard) GB/T 6043-1999
Regulation (derived from) National Standard Approval Announcement 2009 No.3 (Total No.143)
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 determination of the pH value of wood instruments and reagents, test materials sampling and sample preparation, measurement method, and the precision and bias. This standard applies to the determination of the pH value of the wood.

GB/T 6043-2009: Method for determination of pH value of wood

---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.
Method for determination of pH value of wood ICS 79.020 B60 National Standards of People's Republic of China Replacing GB/T 6043-1999 Posted 2009-02-23 2009-08-01 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 6043-1999 "Determination of the pH value of wood." This standard compared with GB/T 6043-1999, the main changes are as follows. --- Added a reference electrode and a glass electrode requirements for pH meter; --- Added to the buffer solution with pH meter calibration requirements; --- Supplemented with distilled water to remove carbon dioxide boiling time requirements; --- Added the sampling method pH-thinning wood and Smallwood measured. Appendix A of this standard is a normative appendix. This standard was proposed by the State Forestry Administration. This standard by the National Standardization Technical Committee timber. This standard is drafted by the Northeast Forestry University. The main drafters of this standard. Fang Guizhen, any of the world to learn, Liu Xing. This standard replaces the standards previously issued as follows. --- GB/T 6043-1985, GB/T 6043-1999.

1 Scope

This standard specifies the determination timber pH value of instruments and reagents, test materials sampling and sample preparation, determination and precision and bias. This standard applies to the determination of the pH of the wood.

2 Terms and definitions

The following terms and definitions apply to this standard. 2.1 Wood powder at room temperature, the pH of distilled water extracts.

3 instruments and reagents

3.1 Instrument 3.1.1 pH meter. 0.01 accuracy, the instrument should have a temperature compensation system and prevent outside influence of the induced current. 3.1.1.1 composite electrode. Usually immersed in distilled water for storage. 3.1.1.2 When using a glass electrode and a reference electrode assembly into a composite electrode membrane glass electrode should be immersed in distilled water and stored in the reference electrode Use extreme calomel electrode or a silver chloride electrode containing a saturated solution of potassium chloride, and save the reference electrode is immersed in a saturated solution of potassium chloride. 3.1.2 scales. accuracy 0.001g. 3.1.3 50mL beaker. 3.1.4 500mL grinding mouth jars. 3.1.5 1000mL volumetric flask. 3.1.6 30mL pipette. 3.1.7 magnetic stirrer or a glass rod. 3.1.8 plant material chopper. 3.1.9 40 mesh to 60 mesh sieve. 3.2 Drugs and reagents 3.2.1.1 analytical grade potassium hydrogen phthalate [KHC6H4 (COO) 2]. 3.2.1.2 analytically pure potassium dihydrogen phosphate (KH2PO4). 3.2.1.3 analytically pure disodium hydrogen phosphate (Na2HPO4). 3.2.1.4 AR borax (Na2B4O7 · 10H2O). 3.2.1.5 analytically pure boric acid (H2BO3). 3.2.1.6 analytically pure citric acid (C4H2O7 · H2O). 3.2.2 carbon dioxide-free distilled water Distilled water was boiled for 5min ~ 10min, and cooled to room temperature.

4 sampling and preparation of test material

4.1 test material requirements 4.1.1 timber.

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