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| SN/T 3371-2012 | English | 359 |
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Latex, rubber. Determination of total solids content
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SN/T 3371-2012
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Standard similar to SN/T 3371-2012 SN/T 5268 Basic data | Standard ID | SN/T 3371-2012 (SN/T3371-2012) | | Description (Translated English) | Latex, rubber. Determination of total solids content | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Word Count Estimation | 9,929 | | Quoted Standard | ISO 123 | | Adopted Standard | ISO 124-2008, IDT | | Regulation (derived from) | National Quality Inspection (2012) 777; industry standard filing Notice 2013 No. 4 (No. 160 overall) | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the concentrated natural rubber latex and synthetic rubber latex Determination of total solids content. This standard applies to the Brazilian rubber tree latex, outside the Brazilian rubber tree latex natural rubber latex, vulcani | SN/T 3371-2012: Latex, rubber. Determination of total solids 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.
Latex, rubber.Determination of total solids content
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Determination of total solids content of the rubber latex
(ISO 124.2008, IDT)
Issued on. 2012-12-12
2013-07-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard is equivalent to international standards ISO 124.2008 (E) "Determination of rubber and latex total solids content" (in English).
This standard adopts ISO 124. 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 ",". ",";
--- Use the "standard" instead of "this International Standard";
--- Delete foreword international standards;
--- Remove introduction of international standards.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. People's Republic of China Beijing Entry-Exit Inspection and Quarantine Bureau, the Beijing Quality and Technical Supervision.
The main drafters of this standard. Chenqing Jun, Tangshu Tian, Manning, leaf light, Shi Jinfeng, Wang Yu, Li Guoqing.
Determination of total solids content of the rubber latex
1 Scope
This standard specifies the method for determination of concentrated natural rubber latex and synthetic rubber latex total solids content.
This standard applies to outside Hevea brasiliensis latex, Hevea brasiliensis latex natural latex, vulcanized latex, latex or synthetic rubber compound
Dispersion may refer apply.
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.
ISO 123 rubber latex samples (Rubberlatex-Sampling)
Principle 3
At atmospheric pressure or under vacuum conditions, according to the provisions of the latex sample was heated to a constant weight is measured by the quality of the sample before and after heating
The total solids content.
Note. heated to a specific period of time after the determination of residues reference GB/T 1725 carried out.
4 Instrument
4.1 flat dish (no edge), a diameter of about 60mm.
4.2 oven, can be maintained at between 70 ℃ ± 2 ℃ or 100 ℃ to 160 ℃ at a selected temperature (accurate to ± 5 ℃).
4.3 vacuum oven, can be maintained at 125 ℃ ± 2 ℃, a pressure less than 20kPa (1kPa = 1kN/m2).
4.4 Analytical balance, a sense of the amount of 0.1mg.
5 Sampling
A method according to ISO 123 at a predetermined sampling.
6 Procedure
6.1 General
Concentrated natural rubber latex operate in accordance with the procedures in 6.2, synthetic rubber latex as needed respectively 6.2,6.3,6.4
Or 6.5 program operation.
6.2 was heated under atmospheric pressure (70 ℃) --- natural rubber latex and synthetic rubber latex
The flat-bottomed dish (4.1) weighed to the nearest 0.1mg. Latex was added 2.0g ± 0.5g, weighed (M0), to the nearest 0.1mg. Gently turn
Bottomed pan, so that the inside of the latex covering bottom of the plate can be added to 1mL of distilled water or water of equivalent purity, if necessary and turn the water and glue
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