계면활성제 종류에 따른 Physical Developer(PD)의 지문 현출 효과 비교: 보관기간의 최적화 시점
Comparison of Fingerprint Development Effectiveness of Physical Developer (PD) According to Detergent Type: Optimization Time of Storage Period
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Physical developer(PD)는 물에 젖거나 오래된 종이에서 지문을 효과적으로 현출할 수 있는 기법이다. PD 작업용액 중 계면활성제 물질로 사용되었던 Synperonic® N이 환경에 유해한 화학물질로 분류되면서 이를 대체할 수 있는 물질을 찾기 위한 연구들이 이어져왔다. 본 연구에서는 여러 계면활성제 중에서 TWEEN® 20, decaethylene glycol mono-dodecyl ether(DGME), Brij® 35를 선정하여 작업용액의 보관기간에 따른 최적화 시점을 찾고, 용액의 지문 현출 효과를 비교해보고자 하였다. 제조 후 보관기간(0일, 1일, 4일, 7일, 10일, 14일)에 따라 비교해본 결과, TWEEN® 20 기반의 PD 작업용액은 제조 후 14일이 지났을 때 지문 현출 효과가 가장 좋았다. 반면, DGME 및 Brij® 35 기반의 PD 작업용액은 제조 후 30분이 지났을 때 사용하는 것이 지문 현출 효과가 가장 좋았으며, DGME 기반의 PD 작업용액은 제조 후 7일이 지났을 때부터 지문 현출 효과가 급격히 약해졌고, Brij® 35 기반의 PD 작업용액은 제조 후 4일이 지났을 때부터는 지문이 현출되지 않았다.
Abstract
Physical developer(PD) is an effective technique that can develop fingerprints on wet or very old paper. Researches have been conducted to find an alternative detergent to Synperonic® N, which is used as a detergent in the PD working solution. Because it was classified as an environmentally harmful chemical. In this study, TWEEN® 20, decaethylene glycol mono-dodecyl ether(DGME), and Brij® 35 were selected among several detergents to find the optimal storage period of PD working solution according to detergent type and to compare the fingerprint development effectiveness of the solution. As a result of comparison according to storage period (0 days, 1 day, 4 days, 7 days, 10 days, 14 days), TWEEN® 20 based PD working solution showed the best fingerprint development effectiveness when 14 days storage period. On the other hand, DGME and Brij® 35 based PD working solutions showed the best fingerprint development effect when used 30 minutes after making the PD working solution. DGME based PD working solution showed a sharp weakening of fingerprint appearance effectiveness after 7 days storage period, and Brij® 35 based PD working solution of 7 days storage period cannot develop any fingerprint at all.
참고문헌 (11)
- Ramotowski, R., "Lee and Gaensslen's advances in fingerprint technology" (2012), CRC Press
- 안수정, "Physical Developer(PD)의 신뢰성 테스트(reagent reliability test)를 위한 타겟물질 탐색과 TWEEN® 20 기반 PD 작업용액의 보관기간에 관한 연구", 분석과학, 36(3), pp.113~120 (2023), 한국분석과학회
- Aslan K., "Surface modification of colloidal gold by chemisorption of alkanethiols in the presence of a nonionic surfactant", Langmuir, 18 (2002)
- Bleay, S., "Visualising the past–An evaluation of processes and sequences for fingermark recovery from old documents", Science & Justice, 59 (2019)
- Cartledge, E. M., "Replacing Syperonic® N in the physical developer fingermark visualisation process : Pseudo-operational trial and parameter studies", Forensic Science International, 326 (2021)
- Coulston, J. L., "Dynamics and mechanism of the physical developer process for visualization of latent fingerprints on paper", Forensic Science International, 333 (2022)
- de la Hunty, M., "Understanding physical developer(PD) : Part I-Is PD targeting lipids?", Forensic Science International, 257 (2015)
- Sauzier, G., "Investigation into the performance of physical developer formulations for visualizing latent fingerprints on paper", Journal of Forensic Identification, 63 (2013)
- Steiner, R., "Evaluation of the use of chemical pads to mimic latent fingermarks for research purposes", Forensic Science International, 314 (2020)
- Thomas-Wilson, A., "Replacing Synperonic® N in the Physical Developer fingermark visualisation process : Reformulation", Forensic Science International, 323 (2021)
- "Directive 2003/53/EC of the European Parliament and of the Council of 18 June 2003, amending for the 26th time Council Directive 76/769/EEC relating to restrictions on the marketing and use of certain dangerous substances and preparations (nonylphenol, nonylphenol ethoxylate and cement)"[URL]