GB/T 35821-2018Determination of biomass content in biomass/plastic composites (English PDF)
生物质/塑料复合材料生物质含量测定方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
February 6, 2018
Implementation date
September 1, 2018
Scope
GB/T 35821-2018 is the English-translated version of 生物质/塑料复合材料生物质含量测定方法.
GB/T 35821-2018 gives a Fourier transform infrared spectrometry method for measuring how much biomass a biomass/plastic composite contains.
It applies to unfoamed composites made mainly from wood or other cellulose-based biomass with PP or PE thermoplastics, processed by extrusion, injection moulding or calendering, and to biomass contents from 30% to 60%.
The document covers the principle, reagents, instruments and equipment, the environmental conditions for installing the instrument, sampling, the determination itself, result processing and the test report.
It defines sample set, calibration model, calibration samples, validation samples and unknown samples, taking these terms from GB/T 24895-2010 and GB/T 29858-2013 on multivariate calibration.
Manufacturers and testing laboratories for wood-plastic products use it. It was issued on 6 February 2018 and has applied since 1 September 2018.
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Document preview — GB/T 35821-2018
National Standard of the People's Republic of China
- ICS
- 79.060.99
- Classification
- B 70
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This standard specifies the terms and definitions of Fourier transform infrared spectrometry biomass/plastic composites biomass content of the original Reagents, instruments and equipment, environmental conditions for installation of instruments, sampling, determination, result processing and presentation, test report.
This standard applies to wood or other cellulose-based biomass and thermoplastics (PP and PE) as the main raw material, the extrusion, injection molding and Calendared processing of unfoamed composite biomass content determination, determination of biomass content range of 30% to 60%.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 24895-2010 grain and oil testing near infrared analysis calibration model validation and network management and maintenance of general rules
General rules for quantitative analysis of molecular spectra by multiple corrections GB/T 29858-2013
3 Terms and definitions
GB/T 24895-2010 and GB/T 29858-2013 defined by the following terms and definitions apply to this document.
3.1 Sample set
A representative collection of samples covering the range of content of the relevant components. [GB/T 24895-2010, Definition 3.7]
3.2 Calibration model
A mathematical expression that expresses the relationship between the concentration or nature of a set of samples and their spectra. [GB/T 29858-2013, Definition 3.2]
3.3 Calibrate sample
The samples used to establish the calibration model are known for their compositional concentration or properties. [GB/T 29858-2013, Definition 3.3]
3.4 Validation sample
Samples used to validate the properties of the model are known for their component concentration or property. [GB/T 29858-2013, Definition 3.6]
3.5 Unknown sample
Samples whose concentration or nature is unknown. [GB/T 29858-2013, Definition 3.12]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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Related Standards
GB/T 24895-2010 — Inspection of grain and oils - General regulations for model authentication of near-infrared analysis and administration and maintenance of network
GB/T 29858-2013 — Standard guidelines for molecular spectroscopy multivariate calibration quantitative analysis
GB/T 7251.4-2026 — Low-voltage switchgear and controlgear assemblies - Part 4: Particular requirements for assemblies for construction sites (ACS)
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GB/T 35821-2018
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