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Capillary Electrophoresis
Studies conducted at Capital Normal University on capillary electrophoresis recently published
April 26th, 2008
"A non-aqueous capillary electrophoresis (NACE) method was developed for analyzing seven basic dyes contained in black ballpoint pen inks. Baseline separation of the studied compounds was achieved on a 57 cm x 75 mu m capillary by using a non-aqueous solution composed of 1.0% acetic acid and 60 mM ammonium acetate in methanol medium," scientists writing in the journal Chromatographia report. "Based on the pattern of NACE electropherograms, 120 black ballpoint pens from different manufacturers were divided into six groups in terms of dye categories. Moreover, the black ballpoint pens from the same group may be further distinguished by cluster analysis based on the...
Source: Law & Health Weekly (2008-04-26)
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