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Weathering Patterns of Ignitable Liquids with the Advanced Distillation Curve Method.

Bruno TJ, Allen S - J Res Natl Inst Stand Technol (2013)

Bottom Line: In this paper, we present results on a variety of ignitable liquids that are not commodity fuels, chosen from the Ignitable Liquids Reference Collection (ILRC).These measurements are assembled into a preliminary database.From this selection, we discuss the significance and forensic application of the temperature data grid and the composition explicit data channel of the ADC.

View Article: PubMed Central - PubMed

Affiliation: National Institute of Standards and Technology, Boulder, CO 80305.

ABSTRACT
One can take advantage of the striking similarity of ignitable liquid vaporization (or weathering) patterns and the separation observed during distillation to predict the composition of residual compounds in fire debris. This is done with the advanced distillation curve (ADC) metrology, which separates a complex fluid by distillation into fractions that are sampled, and for which thermodynamically consistent temperatures are measured at atmospheric pressure. The collected sample fractions can be analyzed by any method that is appropriate. Analytical methods we have applied include gas chromatography (with flame ionization, mass spectrometric and sulfur chemiluminescence detection), thin layer chromatography, FTIR, Karl Fischer coulombic titrimetry, refractometry, corrosivity analysis, neutron activation analysis and cold neutron prompt gamma activation analysis. We have applied this method on product streams such as finished fuels (gasoline, diesel fuels, aviation fuels, rocket propellants), crude oils (including a crude oil made from swine manure) and waste oils streams (used automotive and transformer oils). In this paper, we present results on a variety of ignitable liquids that are not commodity fuels, chosen from the Ignitable Liquids Reference Collection (ILRC). These measurements are assembled into a preliminary database. From this selection, we discuss the significance and forensic application of the temperature data grid and the composition explicit data channel of the ADC.

No MeSH data available.


Related in: MedlinePlus

The distillation curve, presented in Tk, for SEM Plastic Adhesive Promoter, with insets showing the moiety family analysis.
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f6-jres.118.003: The distillation curve, presented in Tk, for SEM Plastic Adhesive Promoter, with insets showing the moiety family analysis.

Mentions: The next ignitable liquid we will discuss is SEM Plastic Adhesive Promoter, a solvent classified as a light petroleum distillate that is used to prepare surfaces in preparation for adhesive construction. It is included in the ILRC database under sample reference No 0214. For brevity, we show in Fig. 6 the distillation curve in Tk (not presented are the Th data, which when examined with Tk do not show azeotropic convergence), with the moiety family analysis shown superimposed as insets. The range of the distillation is approximately 70 °C (as was the case with the previous sample), thus we can expect a significant change in composition to accompany this change. This composition change is clearly reflected in the moiety family analysis, where we observe a decrease in paraffins from a volume fraction of approximately 72 to 28 percent, accompanied by an increase in alkylaromatics from 10 to 80 percent. In Fig. 7, we present the total ion chromatograms of the analysis of each fraction, with the major components labeled. The solvent was again removed electronically. We note how the components progress from light to heavier (generally increasing carbon number) as the distillation proceeds, while in the later stages we note the increase of alkylbezene compounds. This is consistent with the moiety family analysis presented above. Following the same thoughts of our discussion of the previous sample, were this solvent used as an ignitable liquid, we would expect to find in fire debris a suite of compounds such as those represented in the 70 to 90 percent distillate fractions.


Weathering Patterns of Ignitable Liquids with the Advanced Distillation Curve Method.

Bruno TJ, Allen S - J Res Natl Inst Stand Technol (2013)

The distillation curve, presented in Tk, for SEM Plastic Adhesive Promoter, with insets showing the moiety family analysis.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4487305&req=5

f6-jres.118.003: The distillation curve, presented in Tk, for SEM Plastic Adhesive Promoter, with insets showing the moiety family analysis.
Mentions: The next ignitable liquid we will discuss is SEM Plastic Adhesive Promoter, a solvent classified as a light petroleum distillate that is used to prepare surfaces in preparation for adhesive construction. It is included in the ILRC database under sample reference No 0214. For brevity, we show in Fig. 6 the distillation curve in Tk (not presented are the Th data, which when examined with Tk do not show azeotropic convergence), with the moiety family analysis shown superimposed as insets. The range of the distillation is approximately 70 °C (as was the case with the previous sample), thus we can expect a significant change in composition to accompany this change. This composition change is clearly reflected in the moiety family analysis, where we observe a decrease in paraffins from a volume fraction of approximately 72 to 28 percent, accompanied by an increase in alkylaromatics from 10 to 80 percent. In Fig. 7, we present the total ion chromatograms of the analysis of each fraction, with the major components labeled. The solvent was again removed electronically. We note how the components progress from light to heavier (generally increasing carbon number) as the distillation proceeds, while in the later stages we note the increase of alkylbezene compounds. This is consistent with the moiety family analysis presented above. Following the same thoughts of our discussion of the previous sample, were this solvent used as an ignitable liquid, we would expect to find in fire debris a suite of compounds such as those represented in the 70 to 90 percent distillate fractions.

Bottom Line: In this paper, we present results on a variety of ignitable liquids that are not commodity fuels, chosen from the Ignitable Liquids Reference Collection (ILRC).These measurements are assembled into a preliminary database.From this selection, we discuss the significance and forensic application of the temperature data grid and the composition explicit data channel of the ADC.

View Article: PubMed Central - PubMed

Affiliation: National Institute of Standards and Technology, Boulder, CO 80305.

ABSTRACT
One can take advantage of the striking similarity of ignitable liquid vaporization (or weathering) patterns and the separation observed during distillation to predict the composition of residual compounds in fire debris. This is done with the advanced distillation curve (ADC) metrology, which separates a complex fluid by distillation into fractions that are sampled, and for which thermodynamically consistent temperatures are measured at atmospheric pressure. The collected sample fractions can be analyzed by any method that is appropriate. Analytical methods we have applied include gas chromatography (with flame ionization, mass spectrometric and sulfur chemiluminescence detection), thin layer chromatography, FTIR, Karl Fischer coulombic titrimetry, refractometry, corrosivity analysis, neutron activation analysis and cold neutron prompt gamma activation analysis. We have applied this method on product streams such as finished fuels (gasoline, diesel fuels, aviation fuels, rocket propellants), crude oils (including a crude oil made from swine manure) and waste oils streams (used automotive and transformer oils). In this paper, we present results on a variety of ignitable liquids that are not commodity fuels, chosen from the Ignitable Liquids Reference Collection (ILRC). These measurements are assembled into a preliminary database. From this selection, we discuss the significance and forensic application of the temperature data grid and the composition explicit data channel of the ADC.

No MeSH data available.


Related in: MedlinePlus