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GB/T 42426-2023: Chemicals - Vapor pressure test
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GB/T 42426-2023	English	409	Add to Cart	5 days [Need to translate]	Chemicals - Vapor pressure test

GB/T 42426-2023: Chemicals - Vapor pressure test

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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: ...