의문문서의 감정영역에서는 잉크 구성성분의 조성 특성의 비교와 분류를 통하여 식별이 이루어진다. 잉크 분석은 TLC, HPLC/MS, GC/MS, LDI/MS를 이용한 조성분석으로 문서위 기재된 잉크의 조성과 변화에 근거하여 개별 특이성을 확인한다. 본 실험은 잉크 조성 특성 중 휘발성 성분을 확인하고자 5개국에서 생산된 검은색 볼펜잉크 56종을 수집하고 HS-SPME GC/MS를 이용하여 ethylbenzene $0.089sim0.244;{mu}g$/mL, o-xylene $0.072sim0.331;{mu}g$/mL, m,p-xylene $0.062sim0.318;{mu}g$/mL, benzene $0.003sim0.173;{mu}g$/mL, 1,1-dichloroethylene $0.003sim0.295;{mu}g$/mL, toluene $0.007sim0.484;{mu}g$/mL와 같은 휘발성 성분특성 자료를 확보하였으며 잉크시료 개체 특이성과 군집성을 바탕으로 식별자료로 활용할 수 있슴을 알 수 있었다.
In forensic examinations of question document, analysis about inks components and the dating of ink entries is often of considerable importance and forensic examination of inks is principally concerned with the classification and comparison of chemically complex mixtures. The authenticity about inks analysis of a questioned document may be examined through the analysis of inks used to TLC, HPLC/MS, GC/MS, LDI/MS. We collected 56 difference types of black ballpoint pen inks manufactured from 5 country groups. We identified major 6 species volatile organic components (VOCs), ethylbenzene ($0.089-0.244;{mu}g$/mL), o-xylene ($0.072-0.331;{mu}g$/mL), m,p-xylene ($0.062-0.318;{mu}g$/mL), benzene ($0.003-0.173;{mu}g$/mL), 1,1-dichloroethylene ($0.003-0.295;{mu}g$/mL), toluene ($0.007-0.484;{mu}g$/mL) using HS-SPME GC/MS. The results of this study indicated that determined VOCs of black ballpoint pen inks could make a discriminating tool of inks analysis for forensic question document and can supply methodology for classification and identification of between ballpoints pen inks.
