This dissertation focuses on the analysis and development of characterization schemes for cosmetic components, specifically glitter and shimmer particles.
The author of this dissertation considers new types of trace evidence to account for potential lack of evidence found during criminal investigations, due to perpetrators’ increased awareness of common types of evidence such as latent prints, hair, and DNA. This dissertation presents research on the analysis and development of characterization schemes for cosmetic components, specifically glitter and shimmer particles. The analysis of these cosmetic particles was performed using various analytical techniques, including microscopy and spectroscopy, and the developed characterization models were cross-validated to ensure highly accurate performance. After developing the characterization schemes, the cosmetic products were tested over time in different environmental conditions to determine effects on chemical profiles. Results of a human collection study determined that cosmetic residue may remain on individuals up to six hours, allowing for regular daily activities. To determine optimal extraction procedure, a method was developed to extract glitter and shimmer particles from cosmetic products without affecting their chemical profile or physical appearance.
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