GB/T 38787-2020 in English

VALID

Plastics—Methods for the preparation of samples for biodegradation testing of plastic materials

Issued on:2020-04-28
Implemented on:2020-11-01
File Format:PDF
Delivery:Via email within 5 business days

Price(USD)： $340.00
$330.00

Standard No:	GB/T 38787-2020
Document status:	VALID
Title in English:	Plastics—Methods for the preparation of samples for biodegradation testing of plastic materials
Title in Chinese:	塑料材料生物分解试验用样品制备方法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 5 business days
Issued on:	2020-04-28
Implemented on:	2020-11-01
ICS Classification:	83.080.01-Plastics in general
Chinese Classification:	G31-Basic standards and general methods for synthetic resin and plastic
Professional Classification:	GB-National Standard
Related Keywords:	biodegradation test samples sample preparation plastic materials sample morphology control different preparation schemes plastic materials introduction interpretation
Related Topics:	Sample Preparation Sample Preparation Standards Sample preparation method Sample Preparation Preparation Sample preparation method gb plastic break down Plastic digestion method Biological Sample Validation Methods biological sample moisture Electrolytic sample preparation Microplastic test material Plastic digestion method Biological sample din biodigestion method test sample test sample test sample Sample Hydrolysis Apparatus Cross section material sample preparation Test material method Material transmission sample preparation Electrolytic sample preparation equipment biological sample equipment Automatic sample digestion and preparation instrument Preparation Plastic sample preparation equipment Biological Sample Method Validation total biological sample Biological samples and biological sample preparation untie Sample preparation method for polymer materials then biological material Sample digestion method Sample decomposition method Material sample preparation equipment Material biopolymer material Biodegradation biological sample method Preparation Biodegradation Sample decomposition method biological test Method of sample digestion biological test biological sample method biomaterial equipment biomaterial equipment Polymer material sample preparation method Sample Preparation Methods of Polymer Materials Material preparation and testing Material Preparation Test Plastic test sample Metal material sample preparation biological sample box Test materials Sample Material Analysis biological sample 17 Sample digestion method Sample material sp Sample material sp plastic biodegradation Electrolytic sample preparation equipment Definition of biological sample method Biomaterial Items bioseparation material biodegradation technology Materials biodegradation technology Decomposing organisms Substance Biological test equipment biomaterial plastic Material sample box Organic Sample Decomposition What kind of material testing equipment GBT38787 GB/T 38787-2020 plastic material Biological sample homogenizer validation plan tx100 biological sample Validation of biological sample analysis methods Preparation method of electrode material Preparation method of amorphous materials Material Growth Physics Methods Plastic hydrolysis test Methods to improve contrast in biological samples Sample preparation method to investigate parallel sample requirements Preparation method of NMR test sample What are the preparation methods for animal samples? What are the preparation methods for animal samples? Validation content of biological sample analysis methods Biological sample methodology investigation Testing methods for plasticizers in plastic products Methods for Preparing Biological Samples for Electron Microscopy Biochemical analysis methods for biological products Methodological validation content for biological sample analysis Biological sample analysis method development experience preparation What are the standards for developing biological sample methods?

《GB/T 38787-2020塑料材料生物分解试验用样品制备方法》由TC380（全国生物基材料及降解制品标准化技术委员会）归口，主管部门为国家标准化管理委员会。

Introduction

Interpretation of the core content of the standard

This standard is equivalent to the ISO10210:2012 international standard, which specifies the preparation method of biodegradation test samples of plastic materials in the following environments:

Aqueous culture medium (GB/T 19276.1/2)
Controlled composting (GB/T 19277.1/2)
Digested sludge (GB/T 32106/33797)
Soil conditions (GB/T 22047)

Key preparation technologies

1. Sample morphology control

Different preparation schemes are adopted for different raw material forms:

Raw material type	Preparation requirements	Typical size
Pellets/granules	Low temperature mechanical grinding	125-250μm
Film/sheet	Direct cutting or grinding	1cm×1cm
Products	Grinding after cutting	≤1cm³

Instrument and parameter control

Core equipment requirements:

Sieve vibrator: equipped with 250μm (60 mesh) and 125μm (120 mesh) standard sieves
Rotor grinder: ring sieve aperture ≥0.5mm
Microscope: at least 100x magnification

Refrigerant usage specifications: solid carbon dioxide particles 1-10mm or liquid nitrogen, ensure that the sample temperature is below the glass transition temperature.

Implementation recommendations

Key points for quality control

After grinding, the sample must pass the color consistency check
The standard deviation of the particle size distribution should be controlled within 30% of the average value
The sample must be stored away from light and moisture (vacuum desiccator is recommended)

Typical problem solutions: When the sample shows signs of thermal aging, the grinding speed should be reduced or the amount of refrigerant should be increased.

Analysis of Standard Evolution

This standard solves the problem of incomparable data caused by differences in sample preparation in early biodegradation tests, and makes the test results of different laboratories comparable by unifying:

Particle size control range (125-250μm)
Surface treatment method
Thermal history control standard

. Appendix D lists the correspondence with ISO standards in detail.

More samples: YD/T 3934-2021 DL/T 5154-2012 GB 50021-2001(2009)

Sample only — not a preview of GB/T 38787-2020

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