Development and Validation of a Gradient‐HPLC‐PDAD Method for the Identification of Ballpoint Pen Ink Components: Study of Their Decomposition on Aging for Forensic Science Applications

Abstract
A reversed‐phase high performance liquid chromatographic (RP‐HPLC) method, using multi step gradient elution, is described for the simultaneous determination of ball point pen inks: blue violet, fu...