Analytical Science and Technology (분석과학)

The Korean Society of Analytical Sciences (한국분석과학회)
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The study of bloody fingerprint enhancement on paper with chemical reagents

화학시약들을 이용한 지류에서 혈흔지문 증강에 관한 연구

  • Lim, Seung (Scientific Investigation Section, Gyungnam Provincial Police Agency) ;
  • Kim, Im-Soon (Scientific Investigation Section, Gyungnam Provincial Police Agency) ;
  • Noh, Jong-Yun (Scientific Investigation Section, Gyungnam Provincial Police Agency) ;
  • Kim, Sang-Il (Scientific Investigation Section, Gyungnam Provincial Police Agency) ;
  • Yu, Je-Sul (Soonchunyang Univ. Graduate School of Forensic Science)
  • 임승 (경남지방경찰청 과학수사계) ;
  • 김임순 (경남지방경찰청 과학수사계) ;
  • 노종윤 (경남지방경찰청 과학수사계) ;
  • 김상일 (경남지방경찰청 과학수사계) ;
  • 유제설 (순천향대학교 법과학대학원)
  • Received : 2012.06.19
  • Accepted : 2012.08.28
  • Published : 2012.10.25
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Abstract

Bloody fingerprint is a very important evidence. In this study, we confirmed the enhancement effects of ninhydrin, leucocrystal violet (LCV), fuchsin acid, iodine and dimethylaminocinnamaldehyde (DMAC) on bloody fingerprints which were deposited on paper. Bloody fingerprint were deposited on paper sequentially and used after drying at room temperature. If a ridge of bloody fingerprint was clear, ninhydrin and LCV was the most effective but was not good for invisible ridge. Fuchsin acid reagent dyed paper surface so that the contrast of enhanced bloody fingerprint was decreased. Although bloody fingerprint was enhanced with iodine reagent, but the developed color was very weak after reaction. We thought that the enhancement effect of iodine to bloody fingerprint was negligible. Also, the enhancement effect of DMAC reagent to relatively clear bloody fingerprint was not good. However, it was very effective to faint or invisible ridge. By washing with methanol, contrast of enhanced bloody fingerprint was increased.

혈흔지문은 매우 중요한 증거물이다. 본 실험은 지류에 유류된 혈흔지문에 대해 화학시약인 닌히드린, leucocrystal violet (LCV), fuchsin acid, 요오드, dimethylaminocinnam aldehyde (DMAC) 시약들의 증강효과를 확인한 것이다. 혈흔지문은 종이에 순차적으로 유류시킨 후 실온에서 건조해 사용하였다. 혈흔지문 융선이 비교적 선명할 경우에는 닌히드린과 LCV 시약이 가장 효과적이었지만, 눈에 보이지 않는 융선에 대한 증강효과는 크지 않았다. Fuchsin acid 시약을 사용하면 종이 표면이 염색되므로 혈흔지문의 contrast는 오히려 감소했다. 요오드 시약으로 혈흔지문 융선이 증강되긴 했지만, 반응 후 발색이 약하고 증강효과도 크지 않았다. DMAC 시약은 선명한 혈흔지문에 대한 증강효과가 좋지 않았지만, 희미한 융선에 대한 증강에는 매우 효과적이었다. 메탄올로 세척함으로서 DMAC로 증강된 혈흔지문의 contrast를 높일 수 있었다.

Keywords

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