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129th General Meeting of Korean Chemical Society & Exposition A study on Forensic Questioned Document Dating through GC/MS analysis of derivative 2-Phenoxyethanol in black ballpoint pen ink

Submission Date :
2 / 28 / 2022 , 16 : 18 : 21
Abstract Number :
Presenting Type:
Poster Presentation
Presenting Area :
Analytical Chemistry
Authors :
SangJae Oh, Seung-Jin Ryu1,*
Korean National Police University, Korea
1Department of Law,Forensic Science Research Center, Korean National Police University, Korea
Assigned Code :
ANAL.P-341 Assigend Code Guideline
Presenting Time :
April 14 (THU) 11:00~13:00
In order to analyze the dating of the Questioned Document, 2-Phenoxyethanol in black ballpoint pen ink was selected as an indicator material, which was derivatively analyzed with GC/MS equipped with a non-polar column. Black ballpoint pen samples prepared from 1 month to 20 months ago were collected using micro-punch, heated, then analyzed by extracting solvent (Methanol) and derivatives with BSTFA reagents, and m-cresol was used as an internal standard. The result showed a tendency to decrease the detection amount as the black ballpoint samples were written longer, and in particular, ballpoint samples prepared within 11 months showed a tendency to decrease classifiable by section in the first extraction detection amount/second extraction detection amount ratio. It is expected that an analysis technique that is more distinctive and has credibility and reproducibility can be established through improvement of the pretreatment techniques.