LY/T 2557-2015 English PDF

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LY/T 2557-2015: Method for determining the bio-based content of bio-based foam
Status: Valid

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Basic data

Standard ID: LY/T 2557-2015 (LY/T2557-2015)
Description (Translated English): Method for determining the bio-based content of bio-based foam
Sector / Industry: Forestry Industry Standard (Recommended)
Classification of Chinese Standard: B72
Classification of International Standard: 65.05
Word Count Estimation: 8,815
Date of Issue: 2015-10-19
Date of Implementation: 2016-01-01
Regulation (derived from): National Forestry Anministration Announcement ��2015 No.19��
Issuing agency(ies): State Forestry Administration

LY/T 2557-2015: Method for determining the bio-based content of bio-based foam

---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.
Method for determining the bio-based content of bio-based foam ICS 65.05 B72 People's Republic of China Forestry Industry Standard Biobased content in biomass-based foams Detection method Released on October 18,.2015 2016-01-01 implementation State Forestry Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the State Forestry Administration. This standard is under the jurisdiction of the Institute of Chemical Industry of Forest Products of the Chinese Academy of Forestry. This standard is drafted by. Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry. The main drafters of this standard. Tan Weihong, Ma Yan, Wang Hongxiao, Deng Kunming, Shen Juanzhang, Dai Yan, Cai Yanyan, Tong Yajuan, Huang Haitao. Biobased content in biomass-based foams Detection method

1 Scope

This standard specifies the method for the determination of biobased content in biomass-based foams. This standard applies to the identification of biomass-based foams.

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 6682 Analytical laboratory water specifications and test methods.

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Bio-based foam bio-basedfoam A foam material obtained by processing or partially replacing raw materials of petrochemical products with biomass raw materials. 3.2 Modern carbon moderncarbon Modern carbon. Note. The standard material for modern carbon is oxalic acid (SRM4990b) developed by the US National Bureau of Standards and 95% of its radioactivity in 1950. Standard radioactivity of carbon. Since 1959, it has been recognized internationally. 3.3 Bio-based content Percentage of organic carbon activity per gram of sample and ratio of organic carbon activity per gram of modern carbon reference material. Note. The biobased content represents the percentage of total organic carbon in the total organic carbon obtained from renewable resources in the sample, rather than the total mass of the sample. percentage.

4 Principle

Converting carbon in a biomass-based foam sample to carbon dioxide under certain conditions, and converting the produced carbon dioxide into acetylene, After conversion to benzene, the scintillator is added, and the radioactivity ratio of 14C is determined by liquid scintillation method, which is compared with the reference material. The content of the base is used to identify the source of the biobased material.

5 instruments

5.1 Ultra-low background liquid scintillation analyzer, background [cpm (B)]. 0.32 ~ 0.5; quality factor (E2/B). 10000 ~ 16000, (beta nuclides); Efficiency (standard source). 14C. >75%; measurement stability. measured variation less than 0.2%/24h; measured energy range. 1KeV ~.2000KeV (beta nuclides). ......

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