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SN/T 3470.2-2013: Rubber, raw. Determination of bound acrylonitrile content in acrylonitrile-butadiene rubber(NBR). Part 2: Kjeldahl method
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 3470.2-2013 | English | 184 |
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Rubber, raw. Determination of bound acrylonitrile content in acrylonitrile-butadiene rubber(NBR). Part 2: Kjeldahl method
| Valid |
SN/T 3470.2-2013
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Standard similar to SN/T 3470.2-2013 SN/T 5268 SN/T 3470.1 Basic data | Standard ID | SN/T 3470.2-2013 (SN/T3470.2-2013) | | Description (Translated English) | Rubber, raw. Determination of bound acrylonitrile content in acrylonitrile-butadiene rubber(NBR). Part 2: Kjeldahl method | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Word Count Estimation | 10,140 | | Quoted Standard | GB/T 3516-2006; GB/T 15340 | | Adopted Standard | ISO 24698-2-2008, IDT | | Regulation (derived from) | ?AQSIQ About publishing 2013 First Batch 179-items Entry-Exit Inspection and Quarantine industry standard Announcement; Industry-Standard-Filing Announcement 2013 No. 9 (Total No. 165) | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the use of automatic analyzer Acrylonitrile-butadiene rubber (NBR) in the bound acrylonitrile content approach. That Kjeldahl method. This section applies to the use of automated analyzer Acrylonitrile-butadiene rubber (NBR) in com | SN/T 3470.2-2013: Rubber, raw. Determination of bound acrylonitrile content in acrylonitrile-butadiene rubber(NBR). Part 2: Kjeldahl method
---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 Determination of bound acrylonitrile content in acrylonitrile-butadiene rubber (NBR) Part 2. Kjeldahl method
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Raw rubber acrylonitrile - butadiene rubber (NBR) in combination
- Part 2 acrylonitrile content. Kjeldahl method
Rubber, raw-Determinationofboundacrylonitrilecontentin
acrylonitrile-butadienerubber (NBR) -Part 2. Kjeldahlmethod
(ISO 24698-2.2008, IDT)
Issued on. 2013-03-01
2013-09-16 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
SN/T 3470 "raw rubber acrylonitrile - butadiene rubber (NBR) Determination of bound acrylonitrile content" is divided into two parts.
--- Part 1. combustion;
--- Part 2. Kjeldahl method.
This section SN/T 3470 Part 2.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This section identical with the international standard ISO 24698-2.2008 (E).
This part uses ISO 24698-2. When 2008 (E) made editorial changes, the main differences are as follows.
--- With specified format GB/T 1.1-2009 of;
--- Punctuation by Chinese customs editor;
--- Use the decimal symbol instead of decimal symbol ",". ",";
--- With "this Part" instead of "this International Standard";
--- Delete international standards preface, directory and reports section.
This section proposed and managed by the National Certification and Accreditation Administration Committee.
This section was drafted by. People's Republic of China Guangdong CIQ.
The main drafters of this section. Chengu Feng, Liu Sheng, Yang Pei, Fei Qian Jun, Fang Yongkang, Lee Jun, Di Cuiping, Zheng Jianguo.
Raw rubber acrylonitrile - butadiene rubber (NBR) in combination
- Part 2 acrylonitrile content. Kjeldahl method
WARNING. Users should be familiar with this part of the routine laboratory operations. This section does not involve any security issues associated with the use of
Method. Users of this part of the responsibility to provide for appropriate measures before use to ensure personal safety and to determine the rules and regulations
Degree of applicability.
Note. Some of the steps in this section may involve the use or generation of environmentally hazardous substances or cause waste. It should refer to the safe operation and
Appropriate documentation after use disposal.
1 Scope
SN/T 3470 specifies the portion of the automatic analyzer acrylonitrile - butadiene rubber (NBR) bound acrylonitrile content
The method, which Kjeldahl method.
This section applies to automatic analyzer acrylonitrile - butadiene rubber (NBR) binding acrylonitrile content.
Note. Part 1 and Part 2 of this standard for any given rubber samples does not necessarily give the same result.
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.
GB/T 3516-2006 rubber solvent extraction of the analyte (ISO 1407.1992, MOD)
GB/T 15340 natural, synthetic rubber raw sampling and sample preparation method (GB/T 15340-2008, ISO 1795.2000, IDT)
Principle 3
Raw rubber sample digestion nitrogen is converted to ammonium in potassium sulfate, sulfuric acid and copper sulfate catalyst, broken down into after the addition of a strong base
Ammonia, and then steam distilled and the boric acid solution is absorbed, the last titration solution titrated with standard acid.
4 Reagents and materials
Unless otherwise indicated, the reagents used were of analytical grade.
4.1 Standard substance. ammonium sulfate, purity ≥99.5%.
4.2 Acid Standard Solution
4.2.1 sulfuric acid standard titration solution. 0.05mol/L.
4.2.2 hydrochloric acid standard titration solution. 0.05mol/L.
4.3 sulfate. ρ = 1.84g/mL.
4.4 Sodium hydroxide solution. 10mol/L.
4.5 potassium sulfate (K2SO4).
4.6 copper sulfate pentahydrate (CuSO4 · 5H2O).
4.7 indicator, according to the manufacturer's instructions to select.
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