GB/T 24572.2-2009Standard practice for separation and concentration of ignitable liquid residues from fire debris samples - Part 2: Direct headspace vapors sampling (English PDF)
火灾现场易燃液体残留物实验室提取方法 第2部分：直接顶空进样法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 30, 2009
Implementation date
April 1, 2010
Scope
GB/T 24572.2-2009 is the English-translated version of 火灾现场易燃液体残留物实验室提取方法 第2部分：直接顶空进样法.
GB/T 24572.2-2009 is the Chinese standard "Standard practice for separation and concentration of ignitable liquid residues from fire debris samples - Part 2: Direct headspace vapors sampling".
Its scope clause reads: This section GB/T 24572 specifies the scene of the fire principle flammable liquid residue extracted and features, and equipment and test equipment step.
This section applies to laboratory extraction gasoline, kerosene, diesel fuel, paint thinner and alcohol fire scene common flammable liquid residue. Its clauses include terms and definitions; principles and characteristics; equipment and apparatus.
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Document preview — GB/T 24572.2-2009
National Standard of the People's Republic of China
- ICS
- 13.220.01
- Classification
- C 82
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Principles and Characteristics
- 5 Equipment and Apparatus
1 Scope
This section GB/T 24572 specifies the scene of the fire principle flammable liquid residue extracted and features, and equipment and test equipment step.
This section applies to laboratory extraction gasoline, kerosene, diesel fuel, paint thinner and alcohol fire scene common flammable liquid residue.
2 Normative references
The following documents contain provisions which, through reference GB/T 24572 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.
GB/T 18294 (all parts) Identification of fire technology
GB/T 20162 Fire Identification evidence Extraction
3 Terms and Definitions
GB/T 18294 (all parts) and GB/T 20162 and established the following terms and definitions apply to this section.
3.1
A can containing liquid and solid material and has a medical sealing container.
3.2
The samples placed in a sealed container means, to maintain a certain temperature so that samples the vapor - phase equilibrium between the liquid phase is formed, and then with a syringe
Or autosampler extracted directly above the gas components for instrument analysis.
4 Principles and Characteristics
4.1 Principle
The samples placed in sealed airtight container means, means for heating the closed container, so that one of flammable liquid residues to volatile ingredient
Hair, and then extract the gas component volatilized by gas chromatography (GC) or gas chromatography - mass spectrometry (GC-MS) detection.
4.2 Characteristics
Headspace method has the following characteristics.
a) the number of samples can be extracted depends on the size of the sealed container means;
b) adapted to extract a low boiling point of flammable liquids do not apply to extract higher boiling flammable liquids;
c) When the tested materials containing both volatile and less volatile component, due to the high concentration of volatile components and generating greater pressure will
Suppress difficult to extract the volatile components;
d) by the method treated samples, solvent extraction method can also be used again.
5 Equipment and Apparatus
5.1 Device
With temperature oven, heating mantle, autosampler heating plate, temperature setting range is preferably 40 °C ~ 150 °C.
GB 12955-2024 | GB 14102.1-2024 | GB/T 26784-2011 | GB/T 24572.6-2026 | GB/T 24572.5-2013 | GB/T 24572.3-2009 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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Related Standards
GB/T 24572.1-2009 — Standard practice for separation and concentration of ignitable liquid residues from fire debris samples - Part 1: Solvent extraction
GB/T 24572.3-2009 — Standard practice for separation and concentration of ignitable liquid residues from fire debris samples - Part 3: Activated charcoal absorption
GB/T 24572.4-2009 — Standard practice for separation and concentration of ignitable liquid residues from fire debris samples - Part 4: Solid phase microextraction(SPME)
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