GB/T 24572.4-2009Standard practice for separation and concentration of ignitable liquid residues from fire debris samples - Part 4: Solid phase microextraction(SPME) (English PDF)

3.1

By solid phase micro extraction means or extracted samples to analyze samples of substances in the upper part of the space.

4.1 Principle

The samples placed in a sealed container and solid phase micro extraction fiber coated with a first stationary phase extends into the top space of a closed container means in. In the samples of possible flammable liquid residue composition at a certain temperature will volatilize and filled into the container headspace, and the department's

Fiber head adsorbed. After adsorption for a certain time, the head of the fiber insertion by gas chromatography (GC) or gas chromatography - mass spectrometry (GC-MS)

Inlet thermal desorption, parse out the components by gas chromatography (GC) or gas chromatography - mass spectrometry (GC-MS) detection.

4.2 Characteristics

Solid phase micro extraction characteristics are as follows.

a) does not apply to the extraction of oil, high boiling substances;

b) does not destroy the samples of appearance shape can be extracted from traces of flammable liquid residues in samples and can be repeated extraction;

c) suitable for flammable liquids extracted from aqueous samples in the residue;

d) by the method treated samples, sealed after solvent extraction can also be used again.

5.1 heating device

Oven or other heating apparatus with temperature control. Heating means within the volume should be large enough to ensure that you can place multiple samples simultaneously containing capacity

Device. Temperature range of heating equipment 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 24572.2-2009 | […]