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GB/T 45528-2025: Nanotechnology - Measurement of pore size and pore size distribution of nanoporous materials - Fluorescence probe method
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Nanotechnology - Measurement of pore size and pore size distribution of nanoporous materials - Fluorescence probe method
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GB/T 45528-2025
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Basic data | Standard ID | GB/T 45528-2025 (GB/T45528-2025) | | Description (Translated English) | Nanotechnology - Measurement of pore size and pore size distribution of nanoporous materials - Fluorescence probe method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J77 | | Classification of International Standard | 71.040.01 | | Word Count Estimation | 26,290 | | Date of Issue | 2025-04-25 | | Date of Implementation | 2025-11-01 | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | GB/T 45528-2025: Nanotechnology - Measurement of pore size and pore size distribution of nanoporous materials - Fluorescence probe method
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 71.040.01
CCSJ77
National Standard of the People's Republic of China
nano technology
Nanoporous material pore size and pore size distribution test
Fluorescence probe method
Released on 2025-04-25
2025-11-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Method Principle 2
5 Instruments and Equipment 4
6 Reagents and Materials 4
6.1 Fluorescent probes 4
6.2 Other reagents and materials 5
7 Sample and test fluid 5
7.1 Sample 5
7.2 Test fluid 5
7.3 Fluorescent probe mass concentration standard curve 5
8 Test 6
9 Data Processing 6
9.1 Relative fluorescence intensity 6
9.2 Retention rate 7
9.3 Pore size distribution diagram 7
10 Factors affecting uncertainty 7
11 Test Report 7
Appendix A (Informative) Sample Pool Example 9
Appendix B (Informative) Example of Preparation Method of Fluorescent Dye Labeled Protein 11
B.1 Reagents and Materials 11
B.2 Preparation method 11
Appendix C (Informative) Nanoporous Material Pore Diameter Test Example 13
C.1 Fluorescent probes 13
C.2 Test 14
Appendix D (Informative) Nanoporous Material Pore Diameter Test Example 2 16
D.1 Fluorescent probes 16
D.2 Test 17
References 19
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed by the Chinese Academy of Sciences.
This document is under the jurisdiction of the National Nanotechnology Standardization Technical Committee (SAC/TC279).
This document was drafted by. Shanghai University of Engineering Science, National Engineering Research Center for Nanotechnology and Applications, Beijing Institute of Metrology and Testing Science
Institute of Technology, Shandong Sailike Membrane Technology Co., Ltd., Changzhou University, Guangzhou Moxi Technology Co., Ltd., Zhejiang Zhongkai Ruipu Environmental Engineering Co., Ltd.
Company, Zhejiang Membrane Tong Huihai Technology Development Co., Ltd., Zhejiang Guoqian Environmental Technology Development Co., Ltd., and Donghua University.
The main drafters of this document are. Li Guanghui, Wang Jinjie, Liu Rui, Zhu Jun, Zhao Xiaoning, Rao Pinhua, Ma Wenzhong, Hao Yizhou, Guo Jian, Wang Jinguo,
Zhang Junwei, Zhu Jiaying, Zhong Hui, Huang Manhong, Hu Lijiang, and Li Yuliang.
Introduction
Nanoporous materials are a type of solid materials with nanopores, which are widely used in adsorption, separation, catalysis and other fields.
Among porous materials, there is a type of material with filtration and separation characteristics. Due to its high filtration accuracy and low filtration energy consumption, it is used as a green and low-carbon separation product.
It is widely used in various material separation and water treatment processes. In nanoporous materials, the pore structure includes through holes, semi-through holes, closed holes and
Non-standard cylindrical pores. The separation and filtration performance of the material mainly depends on the pore size and pore size distribution at the narrow part of the through hole.
Therefore, testing the pore size and pore size distribution of the narrow through-pores of nanoporous materials is a key indicator to characterize their filtration performance.
This test method uses fluorescent probes as test substances and is based on the interception test principle.
The interception rate of the optical probe can be used to estimate its pore size and pore size distribution. Fluorescent probes have the advantages of high sensitivity and simultaneous detection of multi-channel signals.
The pore size and pore size distribution test can be carried out by dead-end filtration using a low-concentration mixed test solution, which is fast and low-cost.
The test process in the test method is similar to the actual filtration application process of nanoporous materials, and the test results are consistent with their performance in actual applications.
In addition, the low-concentration test solution can effectively overcome the influence of filtration retentate on pore size test and ensure the accuracy of the results.
This test method is highly practical and provides users in related industries with an accurate, fast and low-cost method for measuring the pore size of nanoporous materials.
The implementation of this method will help supplement the relevant standards in the field of nanomaterials in my country.
nano technology
Nanoporous material pore size and pore size distribution test
Fluorescence probe method
1 Scope
This document describes a test method for measuring the through-pore size and pore size distribution of nanoporous materials using a fluorescent probe method.
This document is applicable to the measurement of through-pore size and pore size distribution of nanometer-scale filter materials. For porous materials of other scales, please refer to
This document.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 4774-2013 Terminology of filtration and separation
GB/T 6682 Specifications and test methods for water used in analytical laboratories
GB/T 14799-2024 Determination of effective pore size of geosynthetics - Dry sieving method
GB/T 20103-2006 Terminology of membrane separation technology
GB/T 30544.4-2019 Nanotechnology Terminology Part 4.Nanostructured Materials
GB/T 30544.6-2016 Nanotechnology Terminology Part 6.Characterization of Nanoobjects
GB/T 38949-2020 Porous membrane pore size determination standard particle method
JY/T 0571-2020 General rules for fluorescence spectroscopy analysis methods
3 Terms and definitions
GB/T 4774-2013, GB/T 14799-2024, GB/T 20103-2006, GB/T 30544.4-2019, GB/T 30544.6-
2016, GB/T 38949-2020 and JY/T 0571-2020 and the following terms and definitions apply to this document.
3.1
Nanopore
At least one dimension is at the nanoscale (1nm~100nm), which may contain pores for gas or liquid.
[Source. GB/T 30544.4-2019, 2.13]
3.2
Nanoporous materials
A solid material having nanopores.
[Source. GB/T 30544.4-2019, 3.4]
3.3
effective opening size
The approximate maximum particle diameter that can effectively pass through the sample.
Note. For example, d90 means that 90% of the standard granular materials with a diameter of this value cannot pass through the test sample after filtration, and the pass rate is 10%.
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