The Journal of the Korea Contents Association (한국콘텐츠학회논문지)

The Korea Contents Association (한국콘텐츠학회)
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Post-treatment Enhancement of Ninhydrin-treated Fingermark Using 1,2-IND/Zn

1,2-IND/Zn를 이용한 ninhydrin으로 처리한 지문의 후속 증강 연구

  • 박은지 (순천향대학교 법과학대학원 법과학과) ;
  • 정하나 (순천향대학교 법과학대학원 법과학과) ;
  • 홍성욱 (순천향대학교 법과학대학원 법과학과)
  • Received : 2018.03.12
  • Accepted : 2018.04.08
  • Published : 2018.05.28
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Abstract

Ninhydrin traditionally used to develop fingerprints on paper is often limited in its use depending on background color and its enhancement effect differs depending on reagent reaction condition. Recently 1,2-indanedione(1,2-IND), etc. which has no limitation of background color has been used to visualize the fingermark on paper. Therefore, this study was carried out for enhancement of fingerprints after 1,2-IND/Zn treatment on paper treated with ninhydrin. Comparison between 1,2-IND/Zn reaction after ninhydrin treatment and single ninhydrin reaction were conducted under various methods. Result shows the fingerprints were enhanced when ninhydrin-treated fingerprints were treated with 1,2-IND/Zn, and their enhancement was observed even after 6 months.

종이에 유류된 지문을 현출하기 위하여 전통적으로 사용되는 ninhydrin은 종종 배경색에 따라 사용이 제한되고 시약반응 환경에 따라 현출효과가 달라진다. 그러므로 최근에는 배경색에 제한이 없는 1,2-indanedione(1,2-IND) 등을 사용하고 있다. 이에, 본 연구는 지문 현출을 목적으로 ninhydrin을 처리한 종이에 1,2-IND/Zn를 후속 처리하였을 때 지문의 증강 여부를 확인하고자 하였다. 이를 위하여 시험관 내에서 아미노산과 ninhydrin 시약이 이미 반응한 용액에 1,2-IND/Zn와 DFO를 추가했을 때의 반응을 관찰하고, ninhydrin만 처리한 지문과 ninhydrin을 처리한 후 1,2-IND/Zn 또는 DFO를 처리한 지문의 현출 정도를 비교하였다. 그리고 ninhydrin을 처리한 종이의 보관 기간에 따른 1,2-IND/Zn 증강 효과를 관찰하였다. 그 결과, ninhydrin으로 처리한 종이 내 지문을 1,2-IND/Zn로 처리하였을 때 지문이 증강되었으며, 최대 6개월이 지난 시험지에서도 지문증강효과를 관찰할 수 있었다.

Keywords

Acknowledgement

Supported by : 순천향대학교

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