SN/T 2932-2011_English: PDF (SN/T2932-2011)
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Determination of vapor pressure of the chemicals. Triple expansion method
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SN/T 2932-2011
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| Standard ID | SN/T 2932-2011 (SN/T2932-2011) | | Description (Translated English) | Determination of vapor pressure of the chemicals. Triple expansion method | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | G04 | | Classification of International Standard | 71.100 | | Word Count Estimation | 10,186 | | Date of Issue | 2011-05-31 | | Date of Implementation | 2011-12-01 | | Quoted Standard | GB/T 4756; GB/T 9168; JJG 1098 | | Drafting Organization | Guangdong Exit Inspection and Quarantine of the PRC | | Administrative Organization | National Certification and Accreditation Administration | | Regulation (derived from) | National-Quality-Inspection-accreditation (2011) 291 | | Proposing organization | National Certification and Accreditation Administration Committee | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China | | Summary | This standard specifies the volatile liquid chemical vapor generated in a vacuum pressure method using automatic determination of the vapor pressure tester. This standard applies to the determination of the temperature of 0 ~ 100��C, gas-liquid ratio of 4: 1 to 0. 02: 1, the vapor pressure of not more than 500kPa determination of volatile liquid chemical vapor pressure. This standard does not apply to explosive substances and exposed to air at room temperature automatically ignite the material. This standard does not entirely make recommendations on all issues involved. Therefore, before using this standard, the user must establish appropriate safety and protection measures, and develop appropriate management system. |
SN/T 2932-2011
Determination of vapor pressure of the chemicals.Triple expansion method
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Chemical vapor pressure measurement method Triple Expansion Method
Issued on. 2011-05-31
2011-12-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. People's Republic of China Guangdong Entry-Exit Inspection and Quarantine Shanghai People's Republic of China
Bureau, People's Republic of China Ningbo Exit Inspection and Quarantine.
The main drafters of this standard. Lee Jun, Bo Ping, Huang Ziyi, Di Cuiping, Zheng Jianguo, Chen Xiang, Wu bud, Jiang Wei.
This standard is the first release of the entry-exit inspection and quarantine industry standards.
Chemical vapor pressure measurement method Triple Expansion Method
1 Scope
This standard specifies the volatile liquid chemical vapor produced in the vacuum pressure method of automatic determination of the vapor pressure tester.
This standard applies to the determination of the temperature of 0 ℃ ~ 100 ℃, gas-liquid ratio from 4/1 to 0.02.1, vapor pressure of not higher than the volatile 500kPa
Liquid chemical vapor pressure measurement.
This standard does not apply to explosive substances and exposure to air will auto-ignition material at room temperature. This standard does not involve the safety of all
Suggestions wide issues. Therefore, before using this standard, the user must establish appropriate safety and protective measures, and to develop appropriate management
system.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 4756 petroleum liquids hand sampling method (ISO 3170. 1988, eqv)
GB/T 9168 Petroleum products - Determination of distillation range reduced pressure
JJG1098 thermocouple, RTD automatic measurement system calibration specifications
3 PRINCIPLE OF THE METHOD
An inner piston and can be temperature-controlled test tube, the test tube sealed after injecting a known volume of the sample, the sample volume expansion in three steps
Expansion to the original x 1 times, a measured value of each total pressure after expansion, the value calculated by the three-step total pressure of dissolved air and the partial pressure of air in the sample
Dissolution pressure, the temperature was raised to a certain value and the measured value of the total pressure. Finally, calculated vapor pressure.
4 Terms and Definitions
The following terms and definitions apply to this document.
4.1
Total pressure totalpressure (TPx)
When the gas-liquid ratio and the sample was not dissolved x.1 presence of water, and the air pressure of a gas containing chemicals produced in vacuum.
4.2
The partial pressure of dissolved air partialpressurefromdissolvedair (PPA)
Dissolved by the pressure exerted by the volatile liquid gas in the liquid air.
4.3
Vapor pressure vaporpressure (VPx)
When the gas-liquid ratio is x.1, the total pressure and dissolved air pressure of the points difference.
5 Reagents
Unless otherwise indicated, the reagents used were of analytical grade.
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