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GB/T 12010.7-2010: Plastics -- Poly (vinyl alcohol) (PVAL) materials -- Part 7: Determination for sodium hydroxide contents
Status: Valid GB/T 12010.7: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 12010.7-2010 | English | 149 |
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Plastics -- Poly (vinyl alcohol) (PVAL) materials -- Part 7: Determination for sodium hydroxide contents
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GB/T 12010.7-2010
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| GB/T 12010.7-1989 | English | 199 |
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Determination for ash content of polyvinyl alcohol resins
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GB/T 12010.7-1989
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Basic data | Standard ID | GB/T 12010.7-2010 (GB/T12010.7-2010) | | Description (Translated English) | Plastics -- Poly (vinyl alcohol) (PVAL) materials -- Part 7: Determination for sodium hydroxide contents | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G31 | | Classification of International Standard | 33.080 | | Word Count Estimation | 5,565 | | Date of Issue | 2010-09-02 | | Date of Implementation | 2011-05-01 | | Older Standard (superseded by this standard) | GB/T 12010.11-1989 | | Quoted Standard | GB/T 601; GB/T 603; GB/T 6682 | | Adopted Standard | JIS K6726-1994 (2003), NEQ | | Regulation (derived from) | National Standard Approval Announcement 2010 No.4 (Total No.159) | | 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 method determined by titration of the sodium content in the polyvinyl material. This section applies to an alcohol solution of greater than 70% (mole fraction) of sodium hydroxide polyvinyl material content. | GB/T 12010.7-2010: Plastics -- Poly (vinyl alcohol) (PVAL) materials -- Part 7: Determination for sodium hydroxide contents
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Plastics Poly (vinyl alcohol) (PVAL) materials Part 7. Determination for sodium hydroxide contents
ICS 33.080
G31
National Standards of People's Republic of China
Replacing GB/T 12010.11-1989
Plastic material polyvinyl alcohol (PVAL)
Part 7. Determination of sodium hydroxide
Plastics-Poly (vinylalcohol) (PVAL) materials-
Part 7. Determinationforsodiumhydroxidecontents
Issued on. 2010-09-02
2011-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
GB/T 12010 "plastic material polyvinyl alcohol (PVAL)" is divided into eight sections.
--- Part 1. Designation system and basis;
--- Part 2. Performance measurement;
--- Part 3. Specifications;
Part --- Chapter 4. pH value measurement;
--- Part 5. Determination of the average degree of polymerization;
--- Part 6. Determination of particle size;
--- Part 7. Determination of sodium hydroxide;
--- Part 8. Determination of transparency.
This section GB/T Part of 712,010, and JISK6726.1994 (2003 Confirmafion) "polyvinyl alcohol test method" (Japanese
Version) The non-equivalent.
This Part replaces GB/T 12010.11-1989 "polyvinyl alcohol resin sodium content determination method", and GB/T 12010.11-
The main changes compared to 1989 are as follows.
--- Increasing the reference document (Chapter 2 of this edition);
--- Improve the accuracy of the burette (1989 version 5.3, this version 5.3);
--- Sample weight by the sample (4 ~ 5) g, adjusted to 3g (1989 version 6, edition of 6);
--- Canceled heated to reflux for sample dissolution (1989 version 6, edition of 6).
This part is proposed by the China Petroleum and Chemical Industry Association.
This part of the National Standardization Technical Committee of plastic products and plastic resins General Methods Chapter (SAC/TC15/SC4) centralized.
This section is responsible for drafting unit. Hunan Xiangwei Limited.
This section participated in the drafting unit. China Petrochemical Group of Sichuan Vinylon Works, Ltd. Yunnan Yun-dimensional, synthetic resin national quality supervision
Governor Inspection Center.
The main drafters of this section. Zhuze Li, Shu Xiaoyan, Tang Songqiao, small Yang Lu, Yan Hong, Li Bin, cold leather Hui, Wang Jiandong, Wangyong Gui.
This part of the standard replaces the previous editions are.
--- GB/T 12010.11-1989.
Plastic material polyvinyl alcohol (PVAL)
Part 7. Determination of sodium hydroxide
1 Scope
GB/T 12010 in this section specifies the method for determining the content of polyvinyl alcohol, sodium hydroxide material by titration.
This section applies to the determination of degree of hydrolysis greater than 70% (mole fraction) of the polyvinyl alcohol content of sodium hydroxide material.
2 Normative references
The following documents contain provisions which, through reference GB/T 12010 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this
section.
Preparation of GB/T 601 chemical reagent standard titration solution
GB/T 603 chemical reagent in test methods - Preparations with
Laboratory use specifications and test methods GB/T 6682 Analysis
Principle 3
The sample is dissolved in water, adding an excess of sulfuric acid in the sample of sodium hydroxide and sodium hydroxide standard titration solution and then titrated excess
Sulfuric acid content of the sample is calculated sodium hydroxide. The reaction equation is.
2NaOH H2SO4 = Na2SO4 2H2O
4 Reagents
When this part of the reagents and water, unless otherwise specified, refer to analytically pure reagents and GB/T 6682 in the third grade water.
As used in this part of the standard solution, preparations and products, except where noted according to GB/T 601, GB/T 603 formulation.
4.1 sulfuric acid standard titration solution. c 12H2SO
÷ 4 = 0.1mol/L.
4.2 sodium hydroxide standard titration solution. c (NaOH) = 0.1mol/L.
4.3 Phenolphthalein solution. 10g/L ethanol solution.
5 Instruments
5.1 Balance. accurate to 0.001g.
5.2 Erlenmeyer flask. 500mL.
5.3 Buret. 10mL, accurate to 0.05mL.
5.4 cylinder (cup).200mL.
5.5 dissolution device. can be heated and stirred.
6 steps
Weigh the sample 3g, accurate to 0.001 g of, moved within 500mL conical flask, was added 200mL of water, was added 1 drop 1-2 drops of phenolphthalein solution
Solution (4.3), accurately added 5.00mL sulfuric acid standard titration solution (4.1), the Erlenmeyer flask into the dissolution apparatus and heated sample is completely dissolved
solution. After the sample is dissolved, remove the Erlenmeyer flask, cooled and titrated with sodium hydroxide standard solution (4.2) test solution was titrated to a pink to 30s
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