GB/T 8293-2019_English: PDF (GB/T8293-2019)
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GB/T 8293-2019 | English | 199 |
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Rubber latex, natural, concentrate -- Determination of sludge content
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GB/T 8293-2019
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GB/T 8293-2008 | English | 239 |
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Natural rubber latex concentrate -- Determination of sludge content
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GB/T 8293-2008
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GB/T 8293-2001 | English | 279 |
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Natural rubber latex concentrate -- Determination of sludge content
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GB/T 8293-1987 | English | RFQ |
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Natural rubber latex concentrate--Determination of sludge content
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Standard ID | GB/T 8293-2019 (GB/T8293-2019) | Description (Translated English) | Rubber latex, natural, concentrate -- Determination of sludge content | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | B72 | Classification of International Standard | 83.040.10 | Word Count Estimation | 10,159 | Date of Issue | 2019-06-04 | Date of Implementation | 2020-05-01 | Drafting Organization | Institute of Agricultural Products Processing, Chinese Academy of Tropical Agricultural Sciences, Hainan Natural Rubber Quality Inspection Station, Guangdong Inspection and Quarantine Technology Center, Hainan Natural Rubber Industry Group Co., Ltd. | Administrative Organization | National Standardization Technical Committee of Rubber and Rubber Products (SAC/TC 35) | Proposing organization | China Petroleum and Chemical Industry Federation | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | Standard ID | GB/T 8293-2008 (GB/T8293-2008) | Description (Translated English) | Natural rubber latex concentrate. Determination of sludge content | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | B72 | Classification of International Standard | 83.060 | Word Count Estimation | 6,667 | Date of Issue | 2008-05-15 | Date of Implementation | 2008-11-01 | Older Standard (superseded by this standard) | GB/T 8293-2001 | Quoted Standard | GB/T 8290; ISO/TR 9272 | Adopted Standard | ISO 2005-1992, IDT | Drafting Organization | Institute of Agro Chinese Academy of Tropical Agriculture | Administrative Organization | National Rubber and rubber products for Standardization Technical Committee | Regulation (derived from) | National Standard Approval Announcement 2008 No.8 (Total No.121) | Proposing organization | China Petroleum and Chemical Industry Association | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | Summary | This standard specifies the determination of concentrated natural rubber latex residue. This standard applies to the Brazilian rubber tree produces concentrated natural rubber latex. | Standard ID | GB/T 8293-2001 (GB/T8293-2001) | Description (Translated English) | Natural rubber latex concentrate--Determination of sludge content | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | B72 | Classification of International Standard | 83.040.10 | Word Count Estimation | 7,712 | Date of Issue | 2001/7/20 | Date of Implementation | 2001/12/1 | Older Standard (superseded by this standard) | GB/T 8293-1987 | Quoted Standard | GB/T 8290-1987, | Adopted Standard | ISO 2005-1992, IDT | Drafting Organization | South China Institute of Tropical Agricultural Products Processing Design | Administrative Organization | National Standardization Technical Committee Rubber and Rubber Natural Rubber Technical Committee | Regulation (derived from) | Announcement of Newly Approved National Standards No. 8, 2008 (No. 121 overall) | Proposing organization | Ministry of Agriculture of the People Republic of China | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China | Summary | This Standard specifies determination of natural rubber latex concentrate residue. This Standard is applicable to the Brazilian rubber tree latex production of concentrated natural rubber latex. |
GB/T 8293-2019
Rubber latex, natural, concentrate--Determination of sludge content
ICS 83.040.10
B72
National Standards of People's Republic of China
Replace GB/T 8293-2008
Determination of the content of concentrated natural latex residues
(ISO .2005.2014, MOD)
Published on.2019-06-04
2020-05-01 implementation
State market supervision and administration
China National Standardization Administration issued
Content
Foreword III
1 range 1
2 Normative references 1
3 Principle 1
4 reagent 1
5 Instrument 1
6 sampling 1
7 Test step 2
8 results indicate 2
9 precision 2
10 Test report 2
Appendix A (informative) Precision 3
Reference 5
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 8293-2008 "Determination of the content of concentrated natural rubber latex residue", compared with GB/T 8293-2008, the main
The technical changes are as follows.
--- The scope of Chapter 1 adds "natural latex that does not necessarily apply to other sources; does not apply to latex or vulcanized latex";
--- Change the ISO /T R9272 in the normative reference in Chapter 2 to the reference (see References, No. 2 of the.2008 edition)
chapter);
--- Change "12000m/s2, equipped with two 50mL conical centrifuge tubes" to "12000m/s2 (1200g), equipped with two
50mL conical centrifuge tube or round centrifuge tube" (see 5.1,.2008 version 5.1);
--- Change the "pipette" to "pipette or pipette" (see 5.2, 5.2 of the.2008 edition);
--- Increased requirements for "oven" and "balance" (see 5.3, 5.4);
--- "Dry at 70 °C ± 2 °C, until the weight loss is less than 1mg in 30min" to "more than 70 °C ± 5 °C temperature
Dry until the mass is reduced by less than 1 mg" (see Chapter 7, Chapter 7 of the.2008 edition);
--- Revised the representation method of the residue content calculation formula (see Chapter 8, Chapter 8 of the.2008 edition);
--- Change the precision clause to informative Appendix A "Precision" and update the precision data (see Chapter 9 and Appendix)
A, Chapter 9 of the.2008 edition).
This standard uses the redrafting method to modify the ISO .2005.2014 "Determination of the content of concentrated natural rubber latex residue".
The technical differences between this standard and ISO .2005.2014 and their reasons are as follows.
--- Regarding the normative reference documents, this standard has made technical adjustments to adapt to the technical conditions of China. Adjustment
The situation is reflected in Chapter 2, “Regulatory Citations”, and the specific adjustments are as follows.
● Replace ISO 123 with GB/T 8290 modified to international standards (see Chapter 6).
--- Added "warning" to comply with the provisions of GB/T 20001.4-2015.
--- Change the "pipette" to "pipette or pipette", because the pipette is also a common instrument (see 5.2, ISO .2005..2014 5.2).
--- Increased requirements for "oven" and "balance" to better standardize test conditions (see 5.3, 5.4).
--- Modified the residue formula calculation formula to meet the requirements of GB/T 1.1-2009 (see Chapter 8).
--- Added "The test results are expressed as the average of the results of duplicate measurements" to facilitate the use of this standard (see Chapter 8).
This standard was proposed by the China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of the National Rubber and Rubber Products Standardization Technical Committee (SAC/TC35).
This standard was drafted. Agricultural Products Processing Institute of China Academy of Tropical Agricultural Sciences, Hainan Natural Rubber Quality Inspection Station, Guangdong Inspection
Quarantine Technology Center, Hainan Natural Rubber Industry Group Co., Ltd.
The main drafters of this standard. Li Yimin, Lu Guang, Lin Yunping, Liu Nengsheng, Luo Haizhen, Ji Jiajian.
The previous versions of the standards replaced by this standard are.
---GB/T 8293-1987, GB/T 8293-2001, GB/T 8293-2008.
Determination of the content of concentrated natural latex residues
Caution - Personnel using this standard should have practical experience in formal laboratory work. This standard does not indicate all possible security questions.
question. It is the responsibility of the user to take appropriate safety and health protection measures and to ensure compliance with the relevant national regulations.
1 Scope
This standard specifies the method for determining the content of concentrated natural latex residue.
This standard applies to natural rubber latex from Brazilian trefoil trees and may not be suitable for natural latex from other sources.
This standard does not apply to latex or vulcanized latex.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 8290 concentrated natural latex sampling (GB/T 8290-2008, ISO 123.2001, MOD)
3 Principle
The sample was centrifuged, and the resulting residue was repeatedly washed with an ammonia-ethanol solution and then dried to a constant mass.
4 reagents
Use only validated analytical reagents, distilled water or water of equivalent purity.
4.1 Ammonia-ethanol solution, the composition is as follows.
---Ammonia solution, ρ = (0.90 ± 0.02) g/mL 10mL
---Ethanol, the content is not less than 95% (volume fraction) 340mL
---Water 1000mL
5 instruments
Laboratory routine instruments and the following instruments.
5.1 centrifuge, producing an average acceleration of about 12000m/s2 (1200g), equipped with two 50mL conical centrifuge tubes or round
Heart tube.
5.2 Pipette or straw, the capacity is appropriate, the diameter of the lower mouth is about 2mm.
5.3 The oven can control the temperature at 70 °C ± 5 °C.
5.4 Balance, accurate to 0.1mg.
6 sampling
Sampling according to the method specified in GB/T 8290.
......
GB/T 8293-2008
Natural rubber latex concentrate. Determination of sludge content
ICS 83.060
B72
National Standards of People's Republic of China
GB/T 8293-2008/ISO 2005.1992
Replacing GB/T 8293-2001
Natural rubber latex concentrate Determination of sludge content
(ISO 2005.1992, Rubberlatex, natural, concentrate-
Determinationofsludgecontent, IDT)
Posted 2008-05-15
2008-11-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard is identical with ISO 2005.1992 "Determination of concentrated natural rubber latex residue content" (in English) and its amendments
ISO 2005.1992/Amd. 1.2006 (in English).
For ease of use, the editorial changes made the following standard.
--- "This International Standard" be replaced by "this standard";
--- Delete foreword international standards;
--- References GB/T 8290 Chapter 2 Normative references in this standard and ISO 2005.1992 is not the content TECHNOLOGY
Surgery difference.
This standard replaces GB/T 8293-2001 "Natural rubber latex concentrate - Determination of sludge content."
The main difference compared with the standard GB/T 8293-2001 as follows.
--- Deleted the ISO foreword;
--- Increased Chapter 9, "precision instructions."
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee rubber natural rubber and rubber Technical Committee.
This standard was drafted. Chinese Tropical Institute of Agro Agricultural Sciences, Ministry of Agriculture, Food Quality Supervision and Testing Center
(Zhanjiang).
The main drafters of this standard. ARCHIVES than peace, Chen Chenghai.
This standard was first released in July 1987, in July 2001 the first amendment.
GB/T 8293-2008/ISO 2005.1992
Natural rubber latex concentrate Determination of sludge content
Warning --- personnel should use this standard regular laboratory work experience. This standard does not point out all possible security asked
question. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.
1 Scope
This standard specifies the method for determination of concentrated natural latex residue.
This standard applies to the production of Hevea brasiliensis Natural rubber latex concentrate.
2 Normative reference standard
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
All amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement
Research on whether to use the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 8290 Natural rubber latex concentrate sampling (GB/T 8290-1987, eqv ISO 123. 1985)
ISO /T R9272 Rubber and rubber products - Determination of precision for test method standards (ISO /T R9272.2004, Rubberand
rubberproducts-Determinationofprecisionfortestmethodstandards)
Principle 3
The samples were centrifuged, and the resulting residue was ammonia - ethanol solution was repeatedly washed, then dried to constant weight.
4 Reagents
This standard uses only recognized analytical reagent, distilled water or water of equivalent purity.
Ammonia - ethanol solution, composed as follows.
--- Ammonia solution, ρ0.90g/mL ± 0.02g/mL 10mL
--- Ethanol content of not less than 95% (volume fraction) 340mL
--- Water 1000mL
5 Instruments
Conventional laboratory instruments and equipment as follows.
5.1 centrifuge, produce an average acceleration of approximately 12000m/s2, equipped with two 50mL conical centrifuge tube of.
5.2 pipette, appropriate capacity, under the port diameter of about 2mm.
6 Sampling
Sampling method according to GB/T 8290 regulations.
7 Procedure
Parallel determinations carried out in duplicate using two tubes (5.1) in order to balance each other. To each tube were weighed 40g ~ 45g
Latex concentrate, accurate to 0.1g. Processing each tube press method.
The tubes mouth covered, so as to avoid surface crust during centrifugation. Using laboratory centrifuges about centrifuged 20min, take with a spoon
Most of the cream layer, and then the pipette (5.2) carefully aspirated from the residue of about 10mm above the top of the supernatant liquid.
Ammonia - ethanol to fill the tube, and then centrifuged 25min, with a pipette a distance of about 10mm above the top of the slag supernatant liquid. repeat
GB/T 8293-2008/ISO 2005.1992
......
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