Pyrolysis Products of Linear Alkylbenzenes— Implications in Fire Debris Analysis
: In this case report, potential interferences from an improvised fire‐extinguishing agent, a dishwashing liquid, containing linear alkylbenzene sulfonates (LAS), was studied. The presence of linear alkylbenzenes (LABs) in the fire debris sample was identified from the summed ion profile (SIP) anal...
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| Veröffentlicht in: | Journal of forensic sciences 2013-01, Vol.58 (1), p.210-216 |
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| creator | Contreras, Patricia A. Houck, Stephen S. Davis, William M. Yu, Jorn C.‐C. |
| description | : In this case report, potential interferences from an improvised fire‐extinguishing agent, a dishwashing liquid, containing linear alkylbenzene sulfonates (LAS), was studied. The presence of linear alkylbenzenes (LABs) in the fire debris sample was identified from the summed ion profile (SIP) analysis. It was found that the LAS from dishwashing liquids produce LABs by thermal degradation. Direct pyrolysis of a LAS‐containing dishwashing liquid at 300°C yielded a distribution of LABs in the SIP. LABs began to break down at pyrolysis temperatures between 450 and 500°C and completely break down by 800°C. Observed pyrolysis breakdown products of LABs included toluene, ethylbenzene, meta‐, para‐, and ortho‐xylenes, propylbenzene, indane, naphthalene, and 1‐ and 2‐methylnaphthalenes. These data suggested the presence of LABs in fire debris evidence might complicate subsequent analysis because their breakdown products contained some of the target compounds common to ignitable liquid identification. Therefore, a positive determination of the presence of foreign ignitable liquids should be carefully evaluated when there is a presence of LABs in the SIP. |
| doi_str_mv | 10.1111/j.1556-4029.2012.02194.x |
| format | Article |
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The presence of linear alkylbenzenes (LABs) in the fire debris sample was identified from the summed ion profile (SIP) analysis. It was found that the LAS from dishwashing liquids produce LABs by thermal degradation. Direct pyrolysis of a LAS‐containing dishwashing liquid at 300°C yielded a distribution of LABs in the SIP. LABs began to break down at pyrolysis temperatures between 450 and 500°C and completely break down by 800°C. Observed pyrolysis breakdown products of LABs included toluene, ethylbenzene, meta‐, para‐, and ortho‐xylenes, propylbenzene, indane, naphthalene, and 1‐ and 2‐methylnaphthalenes. These data suggested the presence of LABs in fire debris evidence might complicate subsequent analysis because their breakdown products contained some of the target compounds common to ignitable liquid identification. Therefore, a positive determination of the presence of foreign ignitable liquids should be carefully evaluated when there is a presence of LABs in the SIP.</description><identifier>ISSN: 0022-1198</identifier><identifier>EISSN: 1556-4029</identifier><identifier>DOI: 10.1111/j.1556-4029.2012.02194.x</identifier><identifier>PMID: 22607121</identifier><identifier>CODEN: JFSCAS</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Breakdown ; Breaking down ; Bulging ; Chemical compounds ; Chromatography ; Debris ; fire debris ; Fires ; forensic science ; Forensic sciences ; ignitable liquids ; linear alkylbenzenes ; Liquids ; Mass spectrometry ; Pyrolysis ; pyrolysis‐gas chromatography/mass spectrometry ; substrate interferences ; Substrates ; Toluene</subject><ispartof>Journal of forensic sciences, 2013-01, Vol.58 (1), p.210-216</ispartof><rights>2012 American Academy of Forensic Sciences. Published 2012. This article is a U.S. Government work and is in the public domain in the U.S.A.</rights><rights>Copyright American Society for Testing and Materials Jan 2013</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4304-ab619f31d6716b77b1221d33c621cc3ced80c726160ea2b841c922a8d59759263</citedby><cites>FETCH-LOGICAL-c4304-ab619f31d6716b77b1221d33c621cc3ced80c726160ea2b841c922a8d59759263</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fj.1556-4029.2012.02194.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fj.1556-4029.2012.02194.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1416,27923,27924,45573,45574</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22607121$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Contreras, Patricia A.</creatorcontrib><creatorcontrib>Houck, Stephen S.</creatorcontrib><creatorcontrib>Davis, William M.</creatorcontrib><creatorcontrib>Yu, Jorn C.‐C.</creatorcontrib><title>Pyrolysis Products of Linear Alkylbenzenes— Implications in Fire Debris Analysis</title><title>Journal of forensic sciences</title><addtitle>J Forensic Sci</addtitle><description>: In this case report, potential interferences from an improvised fire‐extinguishing agent, a dishwashing liquid, containing linear alkylbenzene sulfonates (LAS), was studied. The presence of linear alkylbenzenes (LABs) in the fire debris sample was identified from the summed ion profile (SIP) analysis. It was found that the LAS from dishwashing liquids produce LABs by thermal degradation. Direct pyrolysis of a LAS‐containing dishwashing liquid at 300°C yielded a distribution of LABs in the SIP. LABs began to break down at pyrolysis temperatures between 450 and 500°C and completely break down by 800°C. Observed pyrolysis breakdown products of LABs included toluene, ethylbenzene, meta‐, para‐, and ortho‐xylenes, propylbenzene, indane, naphthalene, and 1‐ and 2‐methylnaphthalenes. These data suggested the presence of LABs in fire debris evidence might complicate subsequent analysis because their breakdown products contained some of the target compounds common to ignitable liquid identification. Therefore, a positive determination of the presence of foreign ignitable liquids should be carefully evaluated when there is a presence of LABs in the SIP.</description><subject>Breakdown</subject><subject>Breaking down</subject><subject>Bulging</subject><subject>Chemical compounds</subject><subject>Chromatography</subject><subject>Debris</subject><subject>fire debris</subject><subject>Fires</subject><subject>forensic science</subject><subject>Forensic sciences</subject><subject>ignitable liquids</subject><subject>linear alkylbenzenes</subject><subject>Liquids</subject><subject>Mass spectrometry</subject><subject>Pyrolysis</subject><subject>pyrolysis‐gas chromatography/mass spectrometry</subject><subject>substrate interferences</subject><subject>Substrates</subject><subject>Toluene</subject><issn>0022-1198</issn><issn>1556-4029</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqNkUFP2zAYhi00BF3HX5gs7bJLMn-fEzs-7FAxykCVQGicLcdxJXdp0tmNRjjxI_iF_JIlFHrYBXyxJT_v-9l6CKHAUhjWt1UKeS6SjKFKkQGmDEFl6d0BmewvPpAJY4gJgCqOyccYV4wxAQKOyDGiYBIQJuTmug9t3Ucf6XVoq85uI22XdOEbZwKd1b_7unTNvWtcfHp4pBfrTe2t2fq2idQ3dO6Doz9cGYb8rDHPRZ_I4dLU0Z287FNyOz_7dfozWVydX5zOFonNOMsSUwpQSw6VkCBKKUtAhIpzKxCs5dZVBbMShxczZ7AsMrAK0RRVrmSuUPAp-brr3YT2T-fiVq99tK6uTePaLmrgkAspihzeRlHynHGh1IB--Q9dtV0YvjZSQuUgocCBKnaUDW2MwS31Jvi1Cb0GpkdFeqVHE3o0oUdF-lmRvhuin18GdOXaVfvgq5MB-L4D_vra9e8u1pfzq_HE_wFL353K</recordid><startdate>201301</startdate><enddate>201301</enddate><creator>Contreras, Patricia A.</creator><creator>Houck, Stephen S.</creator><creator>Davis, William M.</creator><creator>Yu, Jorn C.‐C.</creator><general>Blackwell Publishing Ltd</general><general>Wiley Subscription Services, Inc</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>K7.</scope><scope>7X8</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope></search><sort><creationdate>201301</creationdate><title>Pyrolysis Products of Linear Alkylbenzenes— Implications in Fire Debris Analysis</title><author>Contreras, Patricia A. ; Houck, Stephen S. ; Davis, William M. ; Yu, Jorn C.‐C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4304-ab619f31d6716b77b1221d33c621cc3ced80c726160ea2b841c922a8d59759263</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Breakdown</topic><topic>Breaking down</topic><topic>Bulging</topic><topic>Chemical compounds</topic><topic>Chromatography</topic><topic>Debris</topic><topic>fire debris</topic><topic>Fires</topic><topic>forensic science</topic><topic>Forensic sciences</topic><topic>ignitable liquids</topic><topic>linear alkylbenzenes</topic><topic>Liquids</topic><topic>Mass spectrometry</topic><topic>Pyrolysis</topic><topic>pyrolysis‐gas chromatography/mass spectrometry</topic><topic>substrate interferences</topic><topic>Substrates</topic><topic>Toluene</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Contreras, Patricia A.</creatorcontrib><creatorcontrib>Houck, Stephen S.</creatorcontrib><creatorcontrib>Davis, William M.</creatorcontrib><creatorcontrib>Yu, Jorn C.‐C.</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Criminal Justice (Alumni)</collection><collection>MEDLINE - Academic</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Journal of forensic sciences</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Contreras, Patricia A.</au><au>Houck, Stephen S.</au><au>Davis, William M.</au><au>Yu, Jorn C.‐C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Pyrolysis Products of Linear Alkylbenzenes— Implications in Fire Debris Analysis</atitle><jtitle>Journal of forensic sciences</jtitle><addtitle>J Forensic Sci</addtitle><date>2013-01</date><risdate>2013</risdate><volume>58</volume><issue>1</issue><spage>210</spage><epage>216</epage><pages>210-216</pages><issn>0022-1198</issn><eissn>1556-4029</eissn><coden>JFSCAS</coden><abstract>: In this case report, potential interferences from an improvised fire‐extinguishing agent, a dishwashing liquid, containing linear alkylbenzene sulfonates (LAS), was studied. The presence of linear alkylbenzenes (LABs) in the fire debris sample was identified from the summed ion profile (SIP) analysis. It was found that the LAS from dishwashing liquids produce LABs by thermal degradation. Direct pyrolysis of a LAS‐containing dishwashing liquid at 300°C yielded a distribution of LABs in the SIP. LABs began to break down at pyrolysis temperatures between 450 and 500°C and completely break down by 800°C. Observed pyrolysis breakdown products of LABs included toluene, ethylbenzene, meta‐, para‐, and ortho‐xylenes, propylbenzene, indane, naphthalene, and 1‐ and 2‐methylnaphthalenes. These data suggested the presence of LABs in fire debris evidence might complicate subsequent analysis because their breakdown products contained some of the target compounds common to ignitable liquid identification. Therefore, a positive determination of the presence of foreign ignitable liquids should be carefully evaluated when there is a presence of LABs in the SIP.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>22607121</pmid><doi>10.1111/j.1556-4029.2012.02194.x</doi><tpages>7</tpages></addata></record> |
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| subjects | Breakdown Breaking down Bulging Chemical compounds Chromatography Debris fire debris Fires forensic science Forensic sciences ignitable liquids linear alkylbenzenes Liquids Mass spectrometry Pyrolysis pyrolysis‐gas chromatography/mass spectrometry substrate interferences Substrates Toluene |
| title | Pyrolysis Products of Linear Alkylbenzenes— Implications in Fire Debris Analysis |
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