%0 Journal Article
%T Analysis of Writing Age of Ballpoint Pen Ink by Thin-Layer Chromatography<br>薄层色谱法分析圆珠笔色痕形成时间
%A ZHAO Peng cheng
%A WANG Yan ji
%A CUI Lan
%A SHI Xiao fan
%A WANG Yan hua
%A <br>赵鹏程
%A 王彦吉
%A 崔岚
%A 史晓凡
%A 王彦华
%J 色谱
%D 2001
%I 
%X A method based on using a thin-layer chromatographic method (TLC) for determining changes in dye of ballpoint pen ink developed with writing age. An ink drawn line of 1 cm in length was cut and placed in Eppendorf tube. Extraction was performed with 20 microL ethanol at room temperature for 15 min, and heated in steambath for 10 min. The ethanol solution(4 microL) containing the extracted dyes was then spotted on TLC plate by syringe after cooling. The ballpoint pen ink spots were eluted in a solvent of isopropyl alcohol. Using TLC scanner, the spots on TLC plate were scanned at 580 nm. The relations between ratio of peak heights and writing age were attained. Thus, the information on relative writing age can be obtained. And, the powerful evidence for identifying the age of ballpoint pen ink is provided by this method in the field of forensic science.
%K thin
%K layer chromatography
%K forensic science
%K ballpoint pen ink
%K writing age<br>薄层色谱法
%K 法庭科学
%K 圆珠笔油墨
%K 书写时间
%K 文书检验
%K 分析
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=4D81E042D77AFEC6881D14759692069C&aid=37C396C6382ACE4A&yid=14E7EF987E4155E6&vid=2A8D03AD8076A2E3&iid=E158A972A605785F&sid=9C82B18080268586&eid=05340B75C67FF664&journal_id=1000-8713&journal_name=色谱&referenced_num=8&reference_num=3