- Heavy metal contamination in cosmetics is a significant concern due to the potential for chronic health issues from prolonged exposure. This study examines the health risks posed by elemental analysis of lipsticks using Laser-Induced Breakdown Spectroscopy (LIBS). LIBS, recognized for its rapid and precise analytical capabilities, was utilized to detect and quantify toxic elements in various lipstick samples. The experimental setup involved using a Q-switched Nd: YAG laser to generate plasma from the lipstick samples, with the resulting spectral data analyzed to determine their chemical composition. Iron (Fe), Carbon (C), Cobalt (Co), Chromium (Cr), Lead (Pb), Molybdenum (Mo), Barium (Ba), Zinc (Zn) Magnesium (Mg), Calcium (Ca), Cadmium (Cd), Potassium (K), Aluminum (Al), Sodium (Na), Hydrogen (H) and Lithium (Li) were confirmed. Chemometric tools, principal component analysis (PCA) and linear discriminant analysis (LDA) were used to distinguish the lipstick samples. Additionally, plasma parameters such as electron temperature, electron number density, plasma frequency, and inverse bremsstrahlung coefficient were calculated, showing variations with the axial distance from the plasma plume.

Key words- LIBS; Lipstick, Quantitative Analysis, LDA, PCA, Electron Temperature, Electron Number Density, inverse bremsstrahlung coefficient, Plasma Frequency, CF-LIBS