Application of spectroscopic and separation techniques to the examination of the chemical composition stability of lipsticks exposed to various factors and storage conditions

Marta Gładysz; Małgorzata Król; Adrianna Chudecka; Paweł Kościelniak

doi:10.1016/j.forsciint.2020.110230

Application of spectroscopic and separation techniques to the examination of the chemical composition stability of lipsticks exposed to various factors and storage conditions

Forensic Sci Int. 2020 Apr:309:110230. doi: 10.1016/j.forsciint.2020.110230. Epub 2020 Feb 29.

Authors

Marta Gładysz¹, Małgorzata Król², Adrianna Chudecka¹, Paweł Kościelniak¹

Affiliations

¹ Laboratory for Forensic Chemistry, Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387, Kraków, Poland.
² Laboratory for Forensic Chemistry, Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University in Kraków, Gronostajowa 2, 30-387, Kraków, Poland. Electronic address: krolm@chemia.uj.edu.pl.

PMID: 32155535
DOI: 10.1016/j.forsciint.2020.110230

Abstract

In this study, the stability of the chemical composition of lipsticks after exposure to various factors (substrate, time, individual variability, the impact of smoking, the effect of consuming beverages) and storage conditions (laboratory, insolation, without access to light) was examined. The following three analytical methods were used in the study: Attenuated Total Reflection technique (ATR), Gas Chromatography coupled to Mass Spectrometry (GC-MS) and Micellar Electrokinetic Capillary Chromatography (MEKC). Seven red lipsticks characterized by different chemical composition were analyzed. The analysis of variance (ANOVA) was used to estimate the impact of a given factor. It was noticed the lack of influence of individual variability, cigarette smoking and consumed beverages on the stability of the chemical composition of lipsticks. On the other hand, the changes in the chemical composition in lipstick traces depending on the time and storage conditions can be observed - especially when using the GC-MS method. In most cases, the results also indicated the possibility of identifying the lipstick left as a trace, using the ATR and MEKC method even after exposure to various factors and storage conditions. However, the main problem in the case of the ATR analysis is the occurrence of interference originating from the surface on which the trace of lipstick was applied. Ultimately, the conducted research provided evidence for the effectiveness of the MEKC method to the application in forensic science investigation.

Keywords: ANOVA; ATR; GC–MS; Lipsticks traces; MEKC; Stability of chemical compositions.