论文部分内容阅读
研究邻菲啰啉的乙醇溶液显现手掌面铁器遗留印痕的方法。以Lab色彩模式中的a值为评价指标,通过考察影响显现效果中接触时间、试剂浓度、间隔时间、还原剂的使用以及洗手因素的影响,初步建立使用邻菲啰啉的乙醇溶液显现皮肤表面铁器印痕的方法。结果表明,接触时间3 min、试剂浓度1 mg/mL、喷洒抗坏血酸、间隔时间不超过4 h的条件下,显色后与肤色反差大,能达到较好的显现效果,在侦查实践中有很好的应用前景。
Study of phenanthroline ethanol solution to reveal the palm face iron left behind the imprint method. A value of Lab colorimetric model was used to evaluate the effect of exposure time, reagent concentration, interval time, the use of reducing agent and hand washing factors on the appearance of the skin surface by using phenanthroline ethanol solution Iron imprint method. The results showed that the contact time of 3 min, the reagent concentration of 1 mg / mL, ascorbic acid spray, the interval time does not exceed 4 h under the conditions of color and skin color contrast, can achieve better appearance in the investigation practice Good application prospects.