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  2. GB/T 19587-2017 in English
GB/T 19587-2017 in English

GB/T 19587-2017 in English

VALID

Determination of the specific surface area of solids by gas adsorption using the BET method

  • Issued on:2017-09-29
  • Implemented on:2018-04-01
  • File Format:PDF
  • Delivery:Via email within 5 business days
Price(USD)： $370.00
$359.00
Standard No: GB/T 19587-2017
Document status: VALID
Title in English: Determination of the specific surface area of solids by gas adsorption using the BET method
Title in Chinese: 气体吸附BET法测定固态物质比表面积
Language: English
File Format: Electronic (PDF)
Delivery: Via email within 5 business days
Issued on: 2017-09-29
Implemented on: 2018-04-01
Superseding: GB/T 19587-2004 Determination of the specific surface area of solids by gas adsorption using the BET method
ICS Classification: 77.160-Powder metallurgy
Professional Classification: GB-National Standard
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《GB/T 19587-2017气体吸附BET法测定固态物质比表面积》由TC243（全国有色金属标准化技术委员会）归口，TC243SC4（全国有色金属标准化技术委员会粉末冶金分会）执行，主管部门为中国有色金属工业协会。


Introduction

Analysis of the core content of the standard

Version Comparison GB/T 19587-2004 GB/T 19587-2017
Scope of application Non-porous/macroporous materials Extended to mesoporous materials (2-50nm)
Definition of terms 12 6 new terms such as adsorption volume and macropore
Technical charts 7 pictures Optimized to 5 pictures, added IUPAC isotherm classification diagram

Key technical points

BET principle: The monolayer adsorption amount is calculated by the formula (p/p0)/[n(1-p/p0)] = 1/(nmC) + (C-1)(p/p0)/(nmC), applicable to the relative pressure range of 0.05-0.3

Molecular cross-sectional area: At liquid nitrogen temperature (77.3K), the nitrogen molecule is 0.162 nm², and the argon molecule (87.3K) is 0.142 nm²

Implementation Precautions

  1. The degassing temperature needs to be determined by thermogravimetric analysis to avoid sample decomposition (typical value: metal oxides 150-300℃)
  2. For microporous materials, it is recommended to use the t-plot method in Appendix C or NLDFT theory to assist in analysis
  3. For samples with low specific surface area (<1 m²/g), krypton gas adsorption is recommended

Recommended Standard Materials

No. Type Specific Surface Area(m²/g)
BAM-PM-102 Silicon Dioxide 4.35±0.20
SRM 1898 Alumina 155±5

More samples: QC/T 942-2021 JC/T 2453-2018 GB 18306-2015
Sample only — not a preview of GB/T 19587-2017
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