Positive control tests for fingermark development reagents. (May 2020)

• Record Type: Journal Article
• Authors: Janssen-Bouwmeester, Roy; Bremmer, Christiaan; Koomen, Linda; Siem-Gorré, Shermayne; de Puit, Marcel
• Is Part Of: Forensic science international. Volume 310(2020)
• Publication Date: 2020-05
• Subjects: Fingerprint -- Fingermark -- Ninhydrin -- Indanedione -- Positive control -- Simulated fingermark; Medical jurisprudence -- Periodicals; Chemistry, Forensic -- Periodicals; Forensic Medicine -- Periodicals; Médecine légale -- Périodiques; Chimie légale -- Périodiques; Gerechtelijke geneeskunde; Gerechtelijke chemie; Gerechtelijke psychiatrie; Chemistry, Forensic; Medical jurisprudence; Electronic journals; Periodicals; Electronic journals; 614.1
• DOI: 10.1016/j.forsciint.2020.110259
• Languages: English
• ISSNs: 0379-0738

Abstract

Highlights: Limits of detection were determined for ninhydrin and 1.2-indanedione-ZnCl. Simulated fingermarks were printed using a materials printer. Positive control tests were developed for ninhydrin and 1.2-indanedione-ZnCl. Abstract: At the start of this study, no reliable, consistent, challenging and representative positive control test was commercially available for fingermark visualisation techniques. The goal of this study was to determine the lower limits of detection (LOD) of the fingermark visualisation techniques ninhydrin and 1, 2-indanedione-ZnCl and developing positive control tests for these techniques. Spot tests with an amino acid solution were produced to determine the lower LOD's. Secondly, a Dimatix Materials Printer (DMP) was used to print simulated fingermarks using different concentrations of an amino acid solution, to determine the lower LOD of ninhydrin and 1, 2-indanedione-ZnCl using the DMP. Concept positive control tests were developed using the lower LOD of ninhydrin and 1, 2-indanedione-ZnCl. These were later on adjusted, to form the definitive positive control tests, after a testing period of two months.