Implementation and Optimization of the Sodium-Rhodizonate Method for Chemographic Shooting Distance Estimation.
J Forensic Sci
; 64(4): 1169-1172, 2019 Jul.
Article
in En
| MEDLINE
| ID: mdl-30682216
ABSTRACT
In shooting incident investigations where it is important to estimate the shooting distance, the sodium-rhodizonate coloring method has been used for the visualization of GSR patterns extensively. This publication describes the optimization of this method by the use of a heated press for the transfer of GSR traces on garments, as well as variation of a number of other important process parameters. Our final aim for this project was to prepare a formal validation of the coloring method as prerequisite for its inclusion into the scope of ISO17025-certified methods in the GSR Laboratory. A number of important factors and process parameters were identified, such as buffer composition and pH, type of textile used as a substrate and resolution of the documentation of the results. Results were tested using a synthetic proficiency test. Our optimized method has been found to be a very effective technique for visualization of macroscopic GSR traces.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Type of study:
Prognostic_studies
Language:
En
Journal:
J Forensic Sci
Year:
2019
Type:
Article
Affiliation country:
Belgium