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首页> 外文期刊>Forensic science international >Detection of recent holding of firearms: Improving the sensitivity of the PDT test
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Detection of recent holding of firearms: Improving the sensitivity of the PDT test

机译：检测最近持有的枪支：提高PDT测试的灵敏度

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摘要

Despite the significant improvement of the PDT test for detecting recent contact with firearms, there are still many occasions in which the modified reagent (Ferrotrace) shows insufficient sensitivity. Two techniques have been devised and tested for the enhancement of the sensitivity of this process: exposure to water vapors and accelerated sweating. Exposure of the hand to water vapors after spraying with the reagent significantly improved the quality of the colored impressions. The average increase was by 1 quality-grade (on an arbitrary scale of 4 grades). The technique is very simple and does not require any particular skill or equipment. Mechanistic aspects of the process are also discussed.
机译：尽管用于检测最近与枪支接触的PDT测试有了显着改进，但在许多情况下，改性试剂（Ferrotrace）的灵敏度仍然不足。已经设计并测试了两种技术来增强此过程的灵敏度：暴露于水蒸气和加速出汗。在用试剂喷涂后，手暴露于水蒸气会显着改善彩色印模的质量。平均增加1个质量等级（任意4个等级）。该技术非常简单，不需要任何特定技能或设备。还讨论了过程的机械方面。

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