ASTM E1412用活性木炭液上空间无源浓缩法分离从火烧瓦砾样品中获取的可燃液体残渣的标准规范

ASTM E1412  Standard Practice for Separation of Ignitable Liquid Residues from Fire Debris Samples by Passive Headspace Concentration With Activated Charcoal
ASTM E1412用活性木炭液上空间无源浓缩法分离从火烧瓦砾样品中获取的可燃液体残渣的标准规范

This practice is useful for preparing extracts from fire debris for later analysis by gas chromatography, GC/MS, or GC/IR.
This is a very sensitive separation procedure, capable of isolating quantities smaller than 1/10 μL of ignitable liquid residue from a sample.

1. Scope
1.1 This practice covers the procedure for removing small quantities of ignitable liquid residue from samples of fire debris using an adsorbent material to extract the residue from the static headspace above the sample, then eluting the adsorbent with a solvent.
1.2 While this practice is suitable for successfully extracting ignitable liquid residues over the entire range of concentration, the headspace concentration methods are best used when a high level of sensitivity is required due to a very low concentration of ignitable liquid residues in the sample.
1.2.1 Unlike other methods of separation and concentration, this practice is essentially nondestructive.
1.3 Alternate separation and concentration procedures are listed in the referenced documents. (see Practices E 1385, E 1386, E 1388, and E 1413).
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately)
ASTM Standards
ASTM D1193 Specification for Reagent Water
ASTM E752 Practice for Safety and Health Requirements Relating to Occupational Exposure to Carbon Disulfide
ASTM E1385 Practice for Separation and Concentration of Ignitable Liquid Residues from Fire Debris Samples by Steam Distillation
ASTM E1386 Practice for Separation and Concentration of Ignitable Liquid Residues from Fire Debris Samples by Solvent Extraction
ASTM E1387 Test Method for Ignitable Liquid Residues in Extracts from Samples of Fire Debris by Gas Chromatography
ASTM E1388 Practice for Sampling of Headspace Vapors from Fire Debris Samples
ASTM E1413 Practice for Separation and Concentration of Ignitable Liquid Residues from Fire Debris Samples by Dynamic Headspace Concentration
ASTM E1459 Guide for Physical Evidence Labeling and Related Documentation
ASTM E1492 Practice for Receiving, Documenting, Storing, and Retrieving Evidence in a Forensic Science Laboratory
ASTM E1618 Guide for Ignitable Liquid Residues in Extracts from Fire Debris Samples by Gas Chromatography-Mass Spectrometry
Index Terms
fire debris samples; passive headspace concentration;

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 來源：防火網　發布時間：11/7/2013 點擊次數：1218