ASTM E1388从火烧瓦砾样品中进行液上蒸气取样的标准规范

ASTM E1388  Standard Practice for Sampling of Headspace Vapors from Fire Debris Samples
ASTM E1388从火烧瓦砾样品中进行液上蒸气取样的标准规范

This procedure is particularly useful for screening fire debris samples to determine relative ignitable liquid concentrations and possible ignitable liquid class prior to extraction with other techniques.
This practice is useful when volatile oxygenated products such as alcohols or lacquer thinners are suspected.
This practice is the least sensitive of the sample preparation techniques and may not detect quantities of less than 10 μL of petroleum product.
Because this separation takes place in a closed container, the sample remains in approximately the same condition in which it was submitted. Repeat and interlaboratory analyses are therefore possible.
Due to variables in the debris sample condition prior to headspace sampling, complete reproducibility of chromatograms may be difficult to obtain.
4.5.1 To obtain greater reproducibility, use one of the separation procedures which results in a solution of the flammable or combustible liquid residue (see Practices E 1385, E 1386, E 1412, and E 1413.)
High concentrations of highly volatile compounds may swamp the headspace, inhibiting the recovery of less volatile components.

1. Scope
1.1 This practice covers the procedure for removing small quantities of ignitable liguid residue from samples of fire debris by sampling the headspace of the debris container.
1.2 Separation and concentration procedures are listed in the referenced documents. (See Practices E1385, E1386, E1412, and E1413.)
1.3 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 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 E1412 Practice for Separation and Concentration of Ignitable Liquid Residues from Fire Debris Samples by Passive Headspace Concentration
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 Test Method for Ignitable Liquid Residues in Extracts from Fire Debris Samples by Gas Chromatography-Mass Spectrometry
Index Terms
fire debris samples; headspace;

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 来源：防火网　发布时间：11/7/2013 点击次数：1806