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GB/T 8289-2023Natural rubber latex concentrate - Centrifuged or creamed, ammonia-preserved types - Specifications (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

September 7, 2023

Implementation date

April 1, 2024

Scope

GB/T 8289-2023 (Natural rubber latex concentrate - Centrifuged or creamed, ammonia-preserved types - Specifications) is available as an English-translated PDF.

GB/T 8289-2023 is the Chinese standard "Natural rubber latex concentrate - Centrifuged or creamed, ammonia-preserved types - Specifications". Its scope clause reads: This document specifies the specifications for concentrated natural rubber latex prepared entirely or partially with ammonia and produced by centrifugation or paste.

This document applies to concentrated natural rubber latex produced by the centrifugation or creaming method of Brazilian Hevea tree latex. Its clauses include normative reference documents; terms and definitions.

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Document preview — GB/T 8289-2023

National Standard of the People's Republic of China

ICS: 83.040.10
Classification: B 72
Replacing: GB/T 8289-2016

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
1 Scope
2 Normative reference documents
3 Terms and Definitions
4 Technical requirements
5 Sampling

1 Scope

This document specifies the specifications for concentrated natural rubber latex prepared entirely or partially with ammonia and produced by centrifugation or paste.

This document applies to concentrated natural rubber latex produced by the centrifugation or creaming method of Brazilian Hevea tree latex.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations

For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 8290 Latex Sampling (GB/T 8290-2021, ISO 123.2001, MOD)

GB/T 8291 Determination of latex clot content (sieve residue) (GB/T 8291-2023, ISO 706.2004, MOD)

GB/T 8292 Determination of volatile fatty acid value of concentrated natural rubber latex (GB/T 8292-2008, ISO 506.1992, IDT)

GB/T 8293 Determination of residue content of concentrated natural latex (GB/T 8293-2019, ISO.2005.2014, MOD)

GB/T 8295 Photometric method for determination of copper content in natural rubber and latex (GB/T 8295-2008, ISO 8053.1995,

MOD)

GB/T 8296 Determination of manganese content in natural raw rubber and latex - Sodium periodate photometry (GB/T 8296-2008, ISO 7780.

1998,MOD)

GB/T 8297 Determination of potassium hydroxide (KOH) value of concentrated natural latex (GB/T 8297-2023, ISO 127.2018,

MOD)

GB/T 8298 Determination of total solid content of latex (GB/T 8298-2017, ISO 124.2014, MOD)

GB/T 8299 Determination of dry rubber content of concentrated natural rubber latex (GB/T 8299-2008, ISO 126.2005, IDT)

GB/T 8300 Determination of alkalinity of concentrated natural rubber latex (GB/T 8300-2016, ISO 125.2011, IDT)

GB/T 8301 Determination of mechanical stability of concentrated natural latex (GB/T 8301-2008, ISO 35.2004, IDT)

3 Terms and definitions

The following terms and definitions apply to this document.

3.1

Concentrated natural rubber latex containing ammonia and/or other preservatives.

3.2

Centrifugally concentrated natural rubber latex (3.1) preserved only with ammonia after concentration, with an alkalinity of at least 0.60% (mass fraction).

3.3

Centrifugally concentrated natural latex (3.1) preserved with ammonia and other preservatives after concentration, with an alkalinity not greater than 0.29% (mass fraction). […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 11 pages — is available in the English PDF.

Referenced standards

Cited by

GB/T 35819-2018Good agricultural practice for natural rubber

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