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GB/T 42426-2023: Chemicals - Vapor pressure test
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Chemicals - Vapor pressure test
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GB/T 42426-2023
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Basic data | Standard ID | GB/T 42426-2023 (GB/T42426-2023) | | Description (Translated English) | Chemicals - Vapor pressure test | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A80 | | Classification of International Standard | 13.300 | | Word Count Estimation | 21,253 | | Date of Issue | 2023-03-17 | | Date of Implementation | 2023-10-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 42426-2023: Chemicals - Vapor pressure test---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.
ICS13:300
CCSA80
National Standards of People's Republic of China
Chemical Vapor Pressure Test
Chemicals-Vaporpressuretest
2023-10-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
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 contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed and managed by the National Standardization Technical Committee on Hazardous Chemicals Management (SAC/TC251):
This document was drafted by: CCIC Kejian (Tianjin) Inspection and Testing Co:, Ltd:, Ministry of Ecology and Environment Solid Waste and Chemicals Management Technology
Center, Anhui Tanxin Technology Co:, Ltd:, China Academy of Inspection and Quarantine, Xiamen Yinchao Technology Co:, Ltd:, Guizhou Provincial Analysis and Testing Research
Institute, Zhejiang Huiri Environmental Testing Co:, Ltd:, Foshan Xinzheng Chemical Co:, Ltd:, Guangdong Gaoshi Electric Research Technology Co:, Ltd:, Guangdong Mingkai Technology
Co:, Ltd:, Linyi City Inspection and Testing Center:
The main drafters of this document: Zhou Lili, Liu Chunxin, Zhang Ping, Wang Lei, Huo Jian, Chen Xuehai, Liu Chunyan, Chen Huiming, Liao Chaoxuan, Li Wei, Niu Guochun,
Cao Zhibin, Li Ji, Yi Zhonghui, Wan Qinglan:
Chemical Vapor Pressure Test
1 Scope
This document describes the dynamic method, the static method, the liquid vapor pressure gauge method, the percolation method---vapor pressure equilibrium, the percolation method---Knudsen cell, percolation method
Out method --- Determination methods of isothermal thermogravimetry, gas saturation method and rotary method for chemical vapor pressure test:
This document is applicable to the determination of the vapor pressure of solids and liquids at 10-10Pa~105Pa, and is used for samples that are not decomposed under the determination conditions:
If the above conditions are not applicable, please refer to the vapor pressure estimation method in Appendix A:
The comparison of vapor pressure test methods is shown in Table 1:
Table 1 Comparison of vapor pressure test methods
Test Method Solid Substance Liquid Substance Estimated Repeatability Estimated Reproducibility Recommended Range
Low melting point for dynamic method
25% max
1%~5%
25% max
1%~5%
103Pa~2×103Pa
2×103Pa~105Pa
Static method is suitable for 5%~10% 5%~10%
10Pa~105Pa
10-2Pa~105Paa
The liquid vapor manometer method is suitable for 5%~10% 5%~10% 102Pa~105Pa
Exudation method---applicable to vapor pressure balance 5%~20%, maximum 50% 10-3Pa~1Pa
Seepage method --- Knudsen pool is suitable for 10%~30% - 10-10Pa~1Pa
Exudation method --- isothermal thermogravimetry is suitable for 5%~30%, maximum 50% 10-10Pa~1Pa
The gas saturation method is suitable for 10%~30% and the maximum is 50% 10-10Pa~103Pa
The rotary method is suitable for 10%~20% - 10-4Pa~0:5Pa
a Use a capacitance manometer:
Among them, the liquid vapor pressure gauge method is suitable for the determination of vapor pressure of liquid and solid samples, but not for multi-component samples:
The sample test error of non-native impurities is small, and the pressure measurement range recommended by this method is 102Pa~105Pa:
2 Normative references
This document has no normative references:
3 Terms and Definitions
The following terms and definitions apply to this document:
3:1
vapor pressure vapor pressure
The pressure of a vapor in equilibrium with a liquid or solid:
Note: The SI unit of pressure is Pascal (Pa), and the conversion between other units and pressure SI units is as follows:
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