GB/T 8657-2014 English PDF

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GB/T 8657-2014: Rubber, raw styrene-butadiene -- Determination of soap and organic-acid content
Status: Valid

GB/T 8657: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 8657-2014	229	Add to Cart	3 days	Rubber, raw styrene-butadiene -- Determination of soap and organic-acid content	Valid
GB/T 8657-2000	239	Add to Cart	2 days	Rubber, raw styrene-butadiene. Determination of soap and organic-acid content	Obsolete
GB/T 8657-1992	RFQ	ASK	3 days	Rubber, raw styrene-butadiene-soap and organic acid content--Determination	Obsolete

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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Older Standard (superseded by this standard): GB/T 8657-2000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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