GB/T 21650.1-2026 Evaluation of pore size distribution and porosity of solid materials by mercruy poresimetry and gas adsorption—Part 1:Mercury porosimetry (English)
1 Scope
This document describes a method for the evaluation of the pore size distribution and the specific surface area of pores in solids by mercury porosimetry according to the method of Ritter and Drake. It is a comparative test, usually destructive due to mercury contamination, in which the volume of mercury penetrating a pore or void is determined as a function of an applied hydrostatic pressure, which can be related to a pore diameter.
Practical considerations presently limit the maximum applied absolute pressure to about 400 MPa (60 000 psi) corresponding to a minimum equivalent pore diameter of approximately 4 nm. The maximum diameter is limited for samples having a significant depth due to the difference in hydrostatic head of mercury from the top to the bottom of the sample. For the most purposes, this limit can be regarded as 400 μm (for certain samples under specific conditions, the measurable maximum pore diameter can reach 900 μm or even larger). The measurements cover inter-particle and intra-particle porosity. In general, without additional information from other methods it is difficult to distinguish between these porosities where they co-exist. The method is suitable for the study of most porous materials non-wettable by mercury. Samples that amalgamate with mercury, such as certain metals, e.g. gold, aluminium, copper, nickel and silver, can be unsuitable with this technique or can require a preliminary passivation. Under the applied pressure some materials are deformed, compacted or destroyed, whereby open pores may be collapsed and closed pores opened. In some cases it may be possible to apply sample compressibility corrections and useful comparative data may still be obtainable. For these reasons, the mercury porosimetry technique is considered to be comparative.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3165 Sampling of chemical products for industrial use - Safety in sampling
Note: GB/T 3723-1999, Sampling of chemical products for industrial use - Safety in sampling (ISO 3165:1976, IDT)
ISO 14488 Particulate materials - Sampling and sample splitting for the determination of particulate properties
Note: GB/T 47100-2026, Particulate materials - Sampling and sample splitting for the determination of particulate properties (ISO 14488:2007, IDT)
3 Terms and definitions
Foreword I
Introduction III
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Principles
6 Apparatus and material
7 Procedures for calibration and performance
8 Procedures
9 Evaluation
10 Reporting
Annex A (informative) Mercury porosimetry analysis results
Annex B (informative) Recommendations for the safe handling of mercury
Bibliography
Standard
GB/T 21650.1-2026 Evaluation of pore size distribution and porosity of solid materials by mercruy poresimetry and gas adsorption—Part 1:Mercury porosimetry (English)
Standard No.
GB/T 21650.1-2026
Status
valid
Language
English
File Format
PDF
Word Count
12500 words
Translation Price(USD)
375.0
Implemented on
2026-8-1
Delivery
via email in 1 business day
Detail of GB/T 21650.1-2026
Standard No.
GB/T 21650.1-2026
English Name
Evaluation of pore size distribution and porosity of solid materials by mercruy poresimetry and gas adsorption—Part 1:Mercury porosimetry
1 Scope
This document describes a method for the evaluation of the pore size distribution and the specific surface area of pores in solids by mercury porosimetry according to the method of Ritter and Drake. It is a comparative test, usually destructive due to mercury contamination, in which the volume of mercury penetrating a pore or void is determined as a function of an applied hydrostatic pressure, which can be related to a pore diameter.
Practical considerations presently limit the maximum applied absolute pressure to about 400 MPa (60 000 psi) corresponding to a minimum equivalent pore diameter of approximately 4 nm. The maximum diameter is limited for samples having a significant depth due to the difference in hydrostatic head of mercury from the top to the bottom of the sample. For the most purposes, this limit can be regarded as 400 μm (for certain samples under specific conditions, the measurable maximum pore diameter can reach 900 μm or even larger). The measurements cover inter-particle and intra-particle porosity. In general, without additional information from other methods it is difficult to distinguish between these porosities where they co-exist. The method is suitable for the study of most porous materials non-wettable by mercury. Samples that amalgamate with mercury, such as certain metals, e.g. gold, aluminium, copper, nickel and silver, can be unsuitable with this technique or can require a preliminary passivation. Under the applied pressure some materials are deformed, compacted or destroyed, whereby open pores may be collapsed and closed pores opened. In some cases it may be possible to apply sample compressibility corrections and useful comparative data may still be obtainable. For these reasons, the mercury porosimetry technique is considered to be comparative.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 3165 Sampling of chemical products for industrial use - Safety in sampling
Note: GB/T 3723-1999, Sampling of chemical products for industrial use - Safety in sampling (ISO 3165:1976, IDT)
ISO 14488 Particulate materials - Sampling and sample splitting for the determination of particulate properties
Note: GB/T 47100-2026, Particulate materials - Sampling and sample splitting for the determination of particulate properties (ISO 14488:2007, IDT)
3 Terms and definitions
Contents of GB/T 21650.1-2026
Foreword I
Introduction III
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Principles
6 Apparatus and material
7 Procedures for calibration and performance
8 Procedures
9 Evaluation
10 Reporting
Annex A (informative) Mercury porosimetry analysis results
Annex B (informative) Recommendations for the safe handling of mercury
Bibliography
