Review of analytical methods for identification and quantification of Cannabis products.

About 100 recently published original papers, reviews, books and other communications concerning cannabis (hashish, marijuana) constituents have been reviewed with the aim of summarizing the status of analytical detection and quantitation. Detailed protocols of standard analytical methods are compared in order to recommend uniform methods for field and forensic samples and also to provide guidance to less experienced analysts in countries where cannabis sativa occurs (T. Maylon. In Big Deal: The Politics of the Illicit Drug Business, the Cannabis Commodity Market, pp. 63-107. Guernsey, London.). Because of its importance, there has been an increasing number of investigations of the chemical, botanical, pharmacological, clinical and sociological aspects of the marijuana (hashish) problem. Since analytical techniques have improved substantially during the last 10 years, many papers have been published containing a variety of methods for detection and quantification of cannabis constituents. Since the analytical situation is becoming increasingly confused and because many of the journals are unavailable in less developed countries, the aim of this paper is to give an overview of existing analytical techniques and to attempt to distinguish practical and effective methods from those which are complex or which provide questionable results

Radiodense bullet wipe around osseous entrance gunshot wounds

Presented at the 72nd Annual Meeting of the American Academy of Forensic Sciences, February 17‐22, 2020, in Anaheim, CA.Bullet wipe is the material deposited by a bullet on any surface with which it comes into contact after it is fired and may contain debris from the gun barrel, including particles of primer and metal fragments from previously fired bullets. X-ray analysis is a non-destructive method by which traces of metallic elements can be visually detected. The analysis of osseous defects for radiodense bullet wipe (RBW) assists in determining the presence or absence of perforating gunshot wounds, especially in fragmented, skeletonized remains. The aim of our current study was to determine the frequency of RBW around entrance firearms injuries that perforated bone. We prospectively analyzed entrance gunshot wounds for RBW over a three-year period using digital X-ray analysis (n = 59). We retrospectively reviewed the corresponding autopsy reports to determine the frequency of RBW by biologic sex, reported ancestry, age-at-death, location of wound, manner of death, range of fire, bullet caliber, and presence of bullet jacket. Data were analyzed by Fisher's exact test or Chi-square test with significance levels accepted atp < 0.05. RBW was present in 66% (n = 39) of examined cases. Decedent characteristics did not significantly alter RBW distribution, including biologic sex (p = 0.75), reported ancestry (p = 0.49), and age-at-death (p = 0.43). Additionally, the location of the osseous entrance gunshot wound, manner of death, range of fire, and cartridge caliber did not affect RBW detection. All cases involving non-jacketed rounds (n = 5) showed RBW (p = 0.30). To our knowledge, this study is the first to report the frequency of RBW detection from osseous entrance gunshot wounds.12 month embargo; first published: 24 September 2020This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]