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GB/T 34247.1-2017 English PDF

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US$119.00 · In stock
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GB/T 34247.1-2017: Determination of the unsaturation of isobutene-isoprene rubber -- Part 1: Iodometry
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 34247.1-2017	119	Add to Cart	3 days	Determination of the unsaturation of isobutene-isoprene rubber -- Part 1: Iodometry	Valid

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Basic data

Standard ID: GB/T 34247.1-2017 (GB/T34247.1-2017)
Description (Translated English): Determination of the unsaturation of isobutene-isoprene rubber -- Part 1: Iodometry
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G35
Classification of International Standard: 83.040.10
Word Count Estimation: 6,669
Date of Issue: 2017-09-07
Date of Implementation: 2018-04-01
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

GB/T 34247.1-2017: Determination of the unsaturation of isobutene-isoprene rubber -- Part 1: Iodometry

---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.
Determination of the unsaturation of isobutene-isoprene rubber - Part 1. Iodometry ICS 83.040.10 G35 National Standards of People's Republic of China Isobutylene-isoprene rubber (IIR) Determination of unsaturation - Part 1. Iodometric method rubber-Part 1.Iodometry 2017-09-07 Posted 2018-04-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

GB/T 34247 "Determination of unsaturation of isobutylene-isoprene rubber (IIR)" is divided into two parts. --- Part 1. Iodometric method; --- Part 2. Nuclear magnetic resonance spectroscopy. This section GB/T 34247 Part 1. This section drafted in accordance with GB/T 1.1-2009 given rules. This part is proposed by China Petrochemical Corporation. This part of the National Rubber and Rubber Products Standardization Technical Committee sub-Technical Committee of rubber (SAC/TC35/SC6) Focused. This part of the drafting unit. China Petrochemical Co., Ltd. Beijing Yanshan Branch, China National Petroleum Corporation Petroleum Chemical Research Institute. The main drafters of this section. Cui Guanghong, Ma Haiying, Yu Hongyi, Li Xiaoyin, Jiang Liwei. Isobutylene-isoprene rubber (IIR) Determination of unsaturation - Part 1. Iodometric method Warning --- personnel using this section should have formal laboratory work experience. This section does not indicate all possible safety issues question. It is the user's responsibility to take appropriate safety and health measures and to ensure compliance with the requirements of the relevant state laws and regulations.

1 Scope

This part of GB/T 34247 specifies the determination of isobutylene - isoprene rubber (IIR) [commonly known as butyl rubber (IIR)] using the iodometric method Unsatisfactory method. This section applies to IIR raw rubber. Note. This section and GB/T 34247 Part 2 may get different measurement results.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this article Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 601 chemical reagent standard titration solution preparation Laboratory use specifications and test methods for analysis GB/T 6682-2008 GB/T 8170 rounded repair rules and limit values of the representation and judgment GB/T 15340 natural, synthetic raw gum sampling and sample preparation methods

3 Method summary

Under specified conditions, a certain amount of IIR sample is dissolved in carbon tetrachloride, and iodine bromide solution is added thereto to react with it. Unreacted bromination Iodine by adding an excess of potassium iodide solution with the reaction of iodine. Using sodium thiosulfate standard titration solution titration of the generated iodine, at the same time Make a blank experiment. The iodine value was calculated and converted to unsaturation by empirical formula.

4 Reagents and materials

Unless otherwise specified, only reagents identified as analytical grade and grade 3 water specified in GB/T 6682-2008 are used in the analysis. 4.1 Carbon tetrachloride. 4.2 iodine bromide carbon tetrachloride solution .0.05 mol/L. Weigh about 5.1g iodine bromide, accurate to 1mg, dissolved in 500mL carbon tetrachloride. Put the solution in a brown reagent bottle and leave it in the light for 3 weeks before use. 4.3 potassium iodide solution mass fraction of 10%. Weigh about 50g of potassium iodide, accurate to 0.01g, dissolved in 450mL water. when using it Preparation. 4.4 sodium thiosulfate standard titration solution .0.05mol/L. According to the provisions of GB/T 601 preparation and calibration. 4.5 Starch indicator solution .5g/L. Weigh about 0.5g starch, accurate to 0.01g, adding 5mL of water to make a paste; under stirring paste The material was added to 90mL boiling water, slightly boiled 3min, diluted to 100mL after cooling. The resulting solution should be clear or milky white, starch indicator solution Storage time is 2 weeks. If solution is cloudy, reconstitute. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 34247.1-2017_English be delivered?

Answer: Upon your order, we will start to translate GB/T 34247.1-2017_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 34247.1-2017_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 34247.1-2017_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.