区带毛细管电泳法分析黑色签字笔墨水字迹相对形成时间
Relative writing age analysis of the black roller pen inksby capillary zone electrophoresis
讨论了优化电泳条件建立区带毛细管电泳法分析黑色签字笔字迹墨水的分析方法，采用20mmol/L四硼酸钠，pH8.5，未涂层熔融石英毛细管内径100μm，有效柱长40cm，15kV分离电压，光二极管阵列检测器 （PDA），检测波长190～600nm的电泳分离条件，对不同种类黑色签字笔字迹墨水提取液进行了分析；利用毛细管电泳PDA检测器在可见光波长下检测出的黑色签字墨水中不同染料相对含量的变化关系，研究了字迹相对形成时间问题，得出较好的变化规律。
The analytical method for roller pen inks was established by capillary zone electrophoresis.After optimizing such conditions as20mmol桙L borate buffer at pH 8.5, 100μm×40cm fused silica capillary column,separation voltage of15kV,photo diode array (PDA) detector and scanning range190~600nm were adopted in experiment.Electropherogram of different roller pen inks' extracts were obtained. The problem of relative writing age was investigated from relative changes between different dyes in inks detected by PDA in visible wavelength.
black roller pen inks / zone capillary electrophoresis / writin
王彦吉（1948－），男，辽宁省辽阳市人，中国人民公安大学教授，博士生导师；
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