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GB/T 8657-2014: Rubber, raw styrene-butadiene -- Determination of soap and organic-acid content
Status: Valid GB/T 8657: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 8657-2014 | English | 229 |
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Rubber, raw styrene-butadiene -- Determination of soap and organic-acid content
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GB/T 8657-2014
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| GB/T 8657-2000 | English | 239 |
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Rubber, raw styrene-butadiene. Determination of soap and organic-acid content
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GB/T 8657-2000
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| GB/T 8657-1992 | English | RFQ |
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Rubber, raw styrene-butadiene-soap and organic acid content--Determination
| Obsolete |
GB/T 8657-1992
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PDF similar to GB/T 8657-2014
Basic data | Standard ID | GB/T 8657-2014 (GB/T8657-2014) | | Description (Translated English) | Rubber, raw styrene-butadiene -- Determination of soap and organic-acid content | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G34 | | Classification of International Standard | 83.040.10 | | Word Count Estimation | 10,181 | | Date of Issue | 7/8/2014 | | Date of Implementation | 12/1/2014 | | Older Standard (superseded by this standard) | GB/T 8657-2000 | | Quoted Standard | GB/T 601; GB/T 15340 | | Adopted Standard | ISO 7781-2008, MOD | | Regulation (derived from) | 2014 National Standards Bulletin No. 18 | | 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 styrene - butadiene rubber raw soap and organic acid content in two ways: A method for the indicator method, B method for the automatic potentiometric titration. This standard applies to emulsion styrene - buta | GB/T 8657-2014: Rubber, raw styrene-butadiene -- Determination of soap and organic-acid 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.
Rubber, raw styrene-butadiene-Determination of soap and organic-acid content
ICS 83.040.10
G34
National Standards of People's Republic of China
Replacing GB/T 8657-2000
Styrene - Butadiene Rubbers
Determination of soap and organic acids
Styrene-butadienerubber, raw-Determinationofsoapandorganic-acidcontent
(ISO 7781.2008, MOD)
Issued on. 2014-07-08
2014-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 8657-2000 "Styrene - Butadiene Rubber, raw - Determination of soap and organic acid content."
This standard and GB/T 8657-2000 technical differences are as follows.
--- Modify the standard name;
--- Increased warning;
--- Modify the scope (see Chapter 1);
--- Remove the pH value is determined using a fixed end point titration method and related content (see the 2000 edition of Chapter 3, Chapter 4, Section 5
Chapter 7.3, Chapter 8, and 9.2);
--- Increased by potentiometric titration end point jump determination method and related content (see Chapter 3, Chapter 5, 7.3, Chapter 8, 9.2 and
Appendix A);
--- Increase in Appendix B (informative) "rosin test trials."
This standard uses redrafted law revision using ISO 7781.2008 "Styrene - Butadiene Determination of soap and organic raw rubber content"
(In English).
This standard and ISO 7781.2008 technical differences are as follows.
--- On normative references, this standard has been adjusted technical differences, in order to adapt our technical conditions, the adjusted situation
Focus is reflected in the status of Chapter 2, "Normative references", the specific adjustments are as follows.
● equivalents adoption of international standards GB/T 15340 replaces ISO 1795;
● Remove the ISO 385;
● Remove the ISO 648;
● Remove the ISO 1042;
● Remove the ISO 4799;
● increase the GB/T 601.
--- Removed using Soxhlet extractor test solution preparation method.
--- Remove the pH value is determined using a fixed end point titration method and related content.
--- Increased by potentiometric titration end point jump determination method and related content (see Chapter 3, Chapter 5, 7.3, 8 and the first specification
Appendix A).
--- Increasing the allowable difference (see Chapter 9).
The standard proposed by China Petroleum and Chemical Corporation.
This standard by the National Standardization Technical Committee rubber and rubber products, synthetic rubber Technical Committee (SAC/TC35/SC6)
Centralized.
This standard drafting unit. China Petrochemical Research Institute Co., Ltd. Gas Oil, Shen Hua Chemical Industrial Company Limited.
The main drafters of this standard. Gengzhan Jie, Fan Guoning, Diyue Qin, Wu Yi, Xue Huifeng, Yao Xiaohui, Wang Fang Li silver, Li Shuping, Wei Yuli,
Wang Xueli, Da Min peak.
This standard replaces the previous standard published case.
--- GB/T 8657-1988, GB/T 8657-1992, GB/T 8657-2000.
Styrene - Butadiene Rubbers
Determination of soap and organic acids
Warning. Use of this standard should be familiar with normal laboratory practice. This standard does not purport relates to the use of this standard may occur
All security issues. Develop appropriate safety and health system and to ensure compliance with national regulations is the responsibility of the user.
Some analytical methods specified in this standard may involve the use of a substance or substances or generation of waste generated, which may cause local
Environmental hazards. After the test operation should refer to the appropriate security documents for processing.
1 Scope
This standard specifies the determination of styrene - butadiene rubber raw two methods of soap, organic acid. A method for the indicator method, B law
Automatic potentiometric titration.
This standard applies to emulsion styrene - butadiene rubber raw. For aromatic extender oil and (or) phenylene diamine antioxidant
Styrene - butadiene rubber raw, Method B should be adopted.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
Preparation of GB/T 601 chemical reagent standard titration solution
GB/T 15340 natural, synthetic rubber raw sampling and sample preparation method (GB/T 15340-2008, ISO 1795.2000, IDT)
3 Method Summary
The sample preparation into strips with a solvent extracted rubber soap and organic acids, soaps and organic acid content is then determined by acid-base titration.
A method using indicator method, titration with standard hydrochloric acid solution was titrated to determine the content of soap, titrated with sodium hydroxide standard titration solution to measure
Given organic acid content.
B by potentiometric titration method, it is determined by potentiometric titration equivalence point jump point. Using back titration method, plus excess acid with standard sodium hydroxide
Quasi titration solution was titrated to determine the content of soap and organic acids.
4 Reagents
Unless otherwise indicated in the analysis using only the confirmation of analytical grade or higher purity reagents and distilled water or equivalent purity.
4.1 extractant
4.1.1 ethanol - toluene azeotrope liquid (ETA). 7 parts by volume of ethanol and 3 parts by volume of toluene were mixed.
4.1.2 Ethanol - Toluene - water mixture. 95mL of the ETA (4.1.1) was mixed with 5mL of distilled water.
4.2 hydrochloric acid standard titration solution. c (HCl) = 0.05mol/L, prepared according to GB/T 601.
4.3 sodium hydroxide standard titration solution. c (NaOH) = 0.1mol/L, according to GB/T 601 formulation.
4.4 thymol blue indicator. The thymol blue 0.06g dissolved in 6.45mL of 0.02mol/L sodium hydroxide solution (diluted from 4.3 too
To) and diluted with distilled water to 50mL.
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