GB/T 39715.4-2021 in English

VALID

Plastics—Biobased content—Part 4: Determination of biobased mass content

Issued on:2021-08-20
Implemented on:2022-03-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $250.00
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Standard No:	GB/T 39715.4-2021
Document status:	VALID
Title in English:	Plastics—Biobased content—Part 4: Determination of biobased mass content
Title in Chinese:	塑料生物基含量第4部分：生物基物质含量的测定
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2021-08-20
Implemented on:	2022-03-01
Professional Classification:	GB-National Standard
Related Keywords:	bio-based carbon content content part bio-based content bio-based carbon content natural biobased mass content introduction analysis
Related Topics:	iso creature Calculation of biobased content Microbial bromine content Substance content content of tn Sample substance content Plastic voc content Bromine content of plastic Plastic voc content Plastics. Determination of bio-based carbon content. CEN/TS 16137-2011 Biobased content Biomass Meter Preparation and content of substances Content Bio-based Iron content in the material Bio-based samples Substance content Material content Primer content Carbon-based organisms bio-based organisms Bio-based Substance content instrument Substances with a molecular weight of 45 Dry matter content and moisture content Total nitrogen content tn ms substance content Substance content calculation substrate in biology Determination of substance content as content Bio-based and chlorine content substance gc content and base Biomass material gc content base 4 more bases in biology content as The content of each substance in the paint Biomass biological matrix non-biological matrix An instrument for measuring the content of a substance Total oxygen and nitrogen content Reference substance content cod reference substance Bio-based materials Natural bio-based materials Biomass content Oxygen content Reference substance content How to determine the content of a substance Pike Bio non-biological matter base material Amino content Determination method of alkaloid content How to Measure Microbial Quality Measuring substance content instrument tn total nitrogen content biomaterial plastic as content Gas phase substance content biological growth GB/T 39715.4 GB/T 39715.4-2021 The difference between standard materials containing matrix and without matrix Magnetic substance content test Quality of biomass machine sticks Mercury content detection in biomass fuel organism quality What is used to measure the content of effective substances? Biomass plastic Biomass pellet flow rate

《GB/T 39715.4-2021塑料生物基含量第4部分：生物基物质含量的测定》由TC15（全国塑料标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。

Introduction

Analysis of the core content of the standard

This standard is equivalent to the ISO 16620-4:2016 international standard, and establishes a complete method system for determining the content of bio-based substances in plastic products through radiocarbon analyzer and elemental analyzer. Technical points include:

Product classification system

Product type	Characteristics	Testing requirements
Group I products	Prepared by chemical/biological reaction	Need to measure both bio-based carbon content and elemental composition
Group II products	Prepared by physical mixing	Only need to measure bio-based carbon content
Natural components	Directly derived from biomass	Default bio-based content is 100%

Key technical indicators

Take polyethylene terephthalate (PET) as an example:

The fossil-based part (terephthalic acid) accounts for 68.7%
The bio-based part (ethylene glycol) accounts for 31.2%
The elemental composition requires the determination of four elements: C, H, O, and N, among which the oxygen content must be measured

Detailed explanation of the test method

Radiocarbon analysis

According to the ISO 16620-2 standard, the bio-based carbon ratio is determined by measuring the ¹⁴C isotope content, with an allowable error range of ±3%.

Elemental Analysis

One of the following methods is used:

Total Carbon Determination: ISO 609 and other standards, accuracy ±0.4%
Total Hydrogen Determination: Accuracy ±0.2%
Total Oxygen Determination: Difference calculation method is prohibited

Data Verification System

Confidence Level

Allowance for Biobased Carbon

Allowance for Elemental Analysis

Level 1

≤3%

C:±0.4%, H:±0.2%

Level

Implementation suggestions

Sample preparation: Ensure the representativeness of sampling and record the detailed preparation process
Method selection: Group I products need to be analyzed for radiocarbon and elements simultaneously
Data comparison: Use the third level of confidence to verify the difference between the nominal value and the measured value
Report preparation: Must include the 12 core information specified in Clause 6.6

Background of standard evolution

This part is consistent with GB/T The 39715 series of standards together constitute the bio-based plastic evaluation system, and the technical development context is:

2015: Equivalent to the ISO 16620 series of standards
2021: Improve the quantitative method of bio-based substances
Future direction: Expand to the life cycle assessment (LCA) system

More samples: JJG 21-2008 JC/T 2453-2018 DL/T 368-2010

Sample only — not a preview of GB/T 39715.4-2021

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