Gulekci Yakup, Cavus Yonar Fatma, Ozseker Pınar Efeoglu, Gören İsmail Ethem, Daglioglu Nebile
Forensic Sciences Department, Faculty of Engineering and Natural Sciences, Kütahya University of Health Sciences, Kütahya, Türkiye.
Istanbul University-Cerrahpaşa, Institute of Forensic Sciences & Legal Medicine, Istanbul, Türkiye.
Forensic Sci Med Pathol. 2024 Oct 17. doi: 10.1007/s12024-024-00897-2.
Despite various preventative measures, cocaine smuggling is still a major problem worldwide. A recent method of smuggling is the transportation of cocaine with various chemicals or with impregnated materials such as cloth and paper. This study aims to examine the change in the amount of cocaine on the paper surface and attempts to decide the best fingermark development method in the case of smuggling trafficking in the form of impregnated paper with the least effect on the cocaine concentration on the paper. The papers (n = 6 + 1) were prepared for each fingermark development method, including a blank paper, were dipped into a working solution prepared by dissolving 0.38 mg cocaine in 500 mL methanol. Fingermarks were developed by applying various chemicals, including Iodine vapor, 1,2-Indandione, DFO (1,8-diazafluoren-9-one), ThermaNin, 5-MTN (5-methylthioninhydrin), and silver nitrate chemicals and Ninhydrin, which is the most commonly used reagent for visualizing latent prints, particularly on paper surfaces. Also, the natural fingermarks of four different donors, two women and two men between 20 and 50 years of age, were used to compare with the presence of cocaine. Different from others, this study examined the application of DFO and 1,2-Indandione as alternatives to other chemicals and revealed that it is possible to identify cocaine using these methods. The order of success was Ninhydrin > DFO > 1,2-Indandione > ThermaNin > Iodine vapor = 5-MTN. To the best of our knowledge, the current study is the first to investigate fingermark identification methods along with the amounts of cocaine on cocaine-impregnated papers.
尽管采取了各种预防措施，但可卡因走私仍是全球范围内的一个主要问题。最近的一种走私方法是将可卡因与各种化学品或与浸渍材料（如布和纸）一起运输。本研究旨在检测纸表面可卡因含量的变化，并试图确定在以浸渍纸形式进行的走私贩运案件中，对纸上可卡因浓度影响最小的最佳指纹显影方法。针对每种指纹显影方法准备了纸张（n = 6 + 1），包括一张空白纸，将其浸入通过将0.38毫克可卡因溶解在500毫升甲醇中制备的工作溶液中。通过应用各种化学品来显影指纹，包括碘蒸气、1,2 -茚二酮、DFO（1,8 -二氮杂芴-9 -酮）、热宁、5 - MTN（5 -甲基硫代茚三酮）以及硝酸银化学品和茚三酮，茚三酮是用于显现潜在指纹，尤其是在纸张表面的潜在指纹的最常用试剂。此外，还使用了四名年龄在20至50岁之间的不同捐赠者（两名女性和两名男性）的自然指纹来与可卡因的存在情况进行比较。与其他研究不同的是，本研究检测了DFO和1,2 -茚二酮作为其他化学品替代品的应用情况，并表明使用这些方法可以识别可卡因。成功顺序为茚三酮> DFO> 1,2 -茚二酮>热宁>碘蒸气= 5 - MTN。据我们所知，当前的研究是首次同时研究可卡因浸渍纸上的指纹识别方法以及可卡因含量。
