DETECTION OF FIREARM DISCHARGE RESIDUES IN BLOOD-STAINED ARTICLES BY FLORESCENCE

• NCJ Number: 19812
• Journal: FORENSIC SCIENCE Volume: 5 Issue: 1 Dated: (FEBRUARY 1975) Pages: 69-79
• Author(s): N K NAG; M MAZUMDAR
• Date Published: 1975
• Length: 11 pages
• Corporate Author: Elsevier
• Publication Format: Article
• Language: English
• Country: United States of America

Annotation

DESCRIPTION OF QUICK AND SENSITIVE METHOD FOR THE CHEMICAL DETECTION OF NITROUS DERIVATIVES DISCHARGED FROM A FIREARM, PARTICULARLY SUITABLE IN CASES INVOLVING BLOOD-STAINED ARTICLES SUCH AS CLOTHING.

Abstract

FILTER PAPER (WHATMAN NO. 1) OF SUITABLE SIZE IS SOAKED IN A FRESHLY PREPARED 5 PER CENT SOLUTION OF O-PHENYLENEDIAMINE DIHYDROCHLORIDE (MADE IN 50 PER CENT HCL) AND PARTIALLY DRIED. THIS FILTER PAPER IS HELD OVER THE SUSPECTED AREA OF THE GUNSHOT ON THE CLOTHING AND A LITTLE PRESSURE IS EXERTED ON THE PAPER SO THAT IT CAN COME INTO CONTACT WITH ALL PARTS OF THE CLOTHING UNDER IT. THE PAPER IS THEN REMOVED AND HELD OVER A PETRI DISH CONTAINING 25 PER CENT NH4OH SOLUTION. THE PAPER IS THEN PLACED UNDER A SOURCE OF ULTRAVIOLET LIGHT (254NM). THE APPEARANCE OF INTENSE YELLOW SPOTS INDICATES THE PRESENCE OF NITRITE PARTICLES AND THIS PATTERN MAY BE PHOTOGRAPHED AS PERMANENT EVIDENCE TO SHOW THE DISTRIBUTION OF THE PARTICLES. (AUTHOR ABSTRACT)