Evaluation of canines for accelerant detection at fire scenes.
Evaluation of canines for accelerant detection at fire scenes.
复制标题
对火灾现场加速探测犬的评估。
DOI：
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发表时间：
1994
影响因子：
1.6
通讯作者：
K. Broadus
中科院分区：
文献类型：
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作者：
M. E. Kurz;M. Billard;M. Rettig;J. Augustiniak;J. Lange;M. Larsen;R. Warrick;T. Mohns;R. Bora;K. Broadus
近年来，警犬已成功地用于火灾调查，以检测助燃剂残留物。我们着手确定犬能够可靠地检测潜在促进剂的下限。测量量范围从10到少至0.01微升的汽油，煤油，和isopars被施加到预选点沿着一个连续的样品路径（25至40英尺长）制成的燃烧和未燃烧的木材或尼龙地毯条在测试现场。将两只犬引导通过该样品路径至少三次，并记录阳性警报和阴性反应。这两种狗一般都能够提醒点含有0.01微升或以上的所有三种促进剂，或超过吹扫和陷阱回收和气相色谱检测方法。犬科动物偶尔会发出警报，特别是含有痕量苯乙烯残留物的背景，这些残留物是故意添加的特定量或在地毯材料部分热解时形成的。这些狗在含有0.1至1.0微升新鲜应用的汽油或煤油的现场发出警报，这些汽油或煤油放置在实际严重受损的火灾现场，但在含有少量汽油或煤油的样品上不太成功。
In recent years, canines have been successfully used in fire investigations to detect accelerant residues. We set out to determine the lower limits at which canines could reliably detect potential accelerants. Measured amounts ranging from 10 to as little as 0.01 microL of gasoline, kerosene, and isopars were applied to preselected spots along a continuous sample path (25 to 40 feet long) made out of burned and unburned wood or nylon carpeting strips at the testing site. Two canines were led past this sample path at least three times and positive alerts and negative responses were recorded. Both dogs were generally able to alert on spots containing 0.01 microL or more of all three accelerants, at or beyond the purge and trap recovery and gas chromatographic detection method employed. The canines did alert occasionally on background, especially that containing traces of styrene residues, either purposely added in specific amounts or formed upon partial pyrolysis of carpeting material. The dogs alerted on sites containing 0.1 to 1.0 microL of freshly applied gasoline or kerosene placed at actual heavily damaged fire scenes, but were less successful on samples containing smaller amounts.