Types Of Chromatography Were Identified By Blue Ballpoint Pen

It's often required to exame the type and date of writing ink in the documents relate to criminal,economical or civil cases. So the identity of ball-pen ink is very importante for forensic science.Currently,how to identify the writing-date of ball-pen ink has become the hotspot problem in forensic science,and how to indentify the type of ball-pen ink is the most important part,it form the fundation of identifying writing-date. So it has very importance practical meanings to indentify the type of ball-pen ink with chromatography.The paper include four parts:Chapter one analysed the importance ,the development and practice of Ink indentify of ball-pen.Introduced the major components of inks and theory fundation.Chapter two systematical analyzed on the blue ball point writing inks with TLC, Analysed 45 various blue ball-pen ink produced by various country or area. Then classify the ball-pen into three classes and 9 sub-classes.Chapter three systematical analyzed on the blue ball point writing inks with high performance liquid chromatography(HPLC), All 45 blue ballpoint pen collected from different factories in china and foreign were distinguished, Based on the retention time the peak of the main component,three-dimensional diagram etc.Chapter four systematical analyzed on the blue ball point writing inks with GC, All blue ballpoint pen, Based on the solvents of the blue ball point, Then classify the ball-pen into three classes...