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郝叶子,罗亚平,赵雅彬. 水质对物理显影液显现潜在手印效果的影响[J]. 科学技术与工程, 2019, 19(28): 94-100.
HaoYezi,ZhaoYabin.The Effect of Water Quality on the Development of Latent Fingermark by Physical Developer[J].Science Technology and Engineering,2019,19(28):94-100.
水质对物理显影液显现潜在手印效果的影响
The Effect of Water Quality on the Development of Latent Fingermark by Physical Developer
投稿时间:2018-12-11  修订日期:2019-02-27
DOI:
中文关键词:  物理显影液  渗透性客体 潜在手印  显现 水质
英文关键词:physical  developer1 porous  substrate 2 latent  fingerprint3 development4 water  quality5
基金项目:公安部技术研究计划项目(2017JSYJC02)
        
作者单位
郝叶子 中国人民公安大学
罗亚平 中国人民公安大学
赵雅彬 中国人民公安大学
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中文摘要:
      物理显影液是显现潮湿渗透性客体上指纹的重要方法,该方法对配制溶液的水质要求苛刻。为了确定配制溶液的最佳水质条件,本文使用基于非离子表面活性剂-吐温20的配方,比较了超纯水、去离子水、蒸馏水和市售纯净水(润田)四种不同水质条件下配制的物理显影液的指纹显现效果。结果表明:四种水质条件下配制的溶液均可以成功显现指纹,且有44.8%~61.0%的指纹在对比实验中显现效果相当。在超纯水与去离子水的对比实验中,去离子水条件下有34.3%的指纹显现效果优于超纯水条件;在去离子水与蒸馏水的对比实验中,蒸馏水条件下有36.2%的指纹显现效果优于去离子水条件;在蒸馏水与市售纯净水的对比实验中,蒸馏水条件下有42.9%的指纹显现效果优于市售纯净水条件;在市售纯净水与超纯水的对比实验中,市售纯净水条件下有24.8%的指纹显现效果优于超纯水条件。因此,四种水质条件下配置的物理显影液的指纹显现效果为:蒸馏水>>去离子水>超纯水≈市售纯净水。结论是使用蒸馏水配制的物理显影液工作液指纹显现效果明显优于其他三种水质。
英文摘要:
      Physical developer(PD) is an important method for developing fingerprints on wet porous substrates. This method requires high water quality. In order to determine the optimal water quality grade for the solution, this article used a non-ionic surfactant-based formulation of Tween 20, and compared the effects of the physical developer prepared under four different water quality grade of ultrapure water, deionized water, distilled water and commercially available purified water (Runtian). It is found that the solutions prepared under the four water conditions can develop fingerprints successfully, and 44.8%~61.0% of the fingerprints showed similar effects in the comparison experiment. In the experiment comparing PD prepared using the ultrapure water and deionized water, the deionized water grade was superior 34.3% of the time. In the experiment comparing PD prepared using the ultrapure water and deionized water, the deionized water grade was superior 36.2% of the time. In the experiment comparing PD prepared using the ultrapure water and deionized water, the ultrapure water grade was 42.9% of the time. In the experiment comparing PD prepared using the ultrapure water and deionized water, the ultrapure water grade was 24.8% of the time. Therefore, the developing effect of physical developer configured under four water quality conditions is: distilled water >> deionized water > ultra-pure water ≈ commercially available pure water. The conclusion is that the physical developer solution using distilled water is obviously superior to the other three water quality grades.
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