Fingerprint appearing iodine spray

Abstract

The invention relates to a fingerprint appearing iodine spray which comprises the following components: 600 to 750 ml of normal hexane, 300 to 450 ml of ethyl acetate, 25 to 60 g of iodine and 0.5 to 1.2 g of phenyl fluorine. The fingerprint appearing iodine spray has good stability, and not only can be applicable to fingerprint appearing on surfaces of various types of paper, but also has good appearing effects for old fingerprints and fingerprints on tiles and painted walls. The fingerprint appearing iodine spray can be applied to fingerprint appearing in crime scenes and emergency scenes.

Description

technical field [0001] The invention belongs to the technical field of qualitative detection of trace organic matter, and mainly relates to a fingerprint display iodine spray agent, more specifically, the invention relates to a fingerprint display iodine spray agent for extracting fingerprints and handprints. Background technique [0002] Fingerprints are different from person to person, remain unchanged for life and leave traces on objects touched. Scientifically and correctly discovering, extracting, and displaying identification fingerprints has an important practical role in carrying out investigation work and punishing crimes; fingerprint identification is one of the most reliable methods for personal identification, and is used in forensic science to verify, expose and prove crimes; In the investigation and handling of accidents, when the victims or victims of some accidents or natural disasters cannot be identified with the naked eye due to injuries or other reasons, ...

AI Technical Summary

Problems solved by technology

[0004] Guo Wei and Chen Ruili of the People's Public Security University of China invented a new type of iodine spray for fingerprint display, and published it on pages 17-19 of the Journal of the Chinese People's Public Security University (Natural Science Edition) published in the fourth issue of 2007. The new fingerprint display The iodine spray includes 300ml of n-hexane, 500ml of dichloromethane, 200ml of ether, 40-50g of iodine, and 0.6-1.0g of dibromophenylfluorone; the new iodine spray is suitable for fingerprints on special objects such as ceramic tiles, painted walls, and wallpapers. It even has a good effect on the fingerprints left on the washed tiles, but the stability of the iodine spray on the fingerprints needs to be further improved.