Phase Transfer Catalysis in the Aid of Fingerprint Development

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Abstract

This paper relates to the application of a novel spray formulation for developing latent fingermarks on a wide range of crime scene evidences. The formulation is based on a xanthene dye, rose Bengal, and a phase transfer catalyst, t-tetrabutylammonium iodide. It takes just 2-3 minutes to develop optimum on a broad spectrum of fingerprint evidences of non-porous, semi porous and porous substrates. It also detects fingerprints on items that are white and multi-colored, and smooth and rough. In addition, it develops fingerprints on a variety of adhesive tapes, including duct tape, which is used by suicide bombers to wrap explosives on their bodies. It also detects impressions on such items that have been ex-posed to water and high temperatures. The spray solution is pre-pared in water. The ingredients of the formulation are non-toxic, cheap and easily procurable.

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Sodhi, G. S., & Kaur, J. (2019). Phase Transfer Catalysis in the Aid of Fingerprint Development. Arab Journal of Forensic Sciences and Forensic Medicine, 1(9), 1185–1188. https://doi.org/10.26735/16586794.2019.005

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