双溶剂提取法偏差范围的实验分析

目的双溶剂提取法是鉴定圆珠笔油墨字迹相对书写时间的方法之一,该方法简单有效,但在实际办案中发现,提取率的范围对数据的偏差范围有着直接影响。本文旨在通过实验分析偏差范围。方法通过对多种牌号的圆珠笔油墨新书写的字迹样本和自然老化样本进行平行实验。结果得到了不同提取率范围内的圆珠笔油墨提取率偏差范围。结论为双溶剂提取法鉴定圆珠笔油墨相对书写时间的界定提供了较为可靠的实验依据。

Experimental Analysis of the Deviation Range of Double-solvent Extraction in Dating of Ball-Point Pen Inks

Objective Double-solvent extraction is a simple and effective method for dating of ball-point pen inks. However, the range of deviation is affected by the rate of extraction in the application of the method. The study is to find the range of deviation through experiments. Method New and aged ink samples of different brands were tested, and the range of deviation was analyzed. Result The range of deviation for different rate of extraction was obtained. Conclusion Reliable Experimental data were provided for applying double-solvent extraction in dating of ball-point pen ink writing.