title: Investigation of lead contents in lipsticks by solid sampling high resolution continuum source electrothermal atomic absorption spectrometry.
abstract: In this study, the lead contents of different kinds of lipsticks were determined by solid sampling high resolution continuum source electrothermal atomic absorption spectrometry (SS-HR-CS ET AAS) and the results were compared with those obtained after microwave-assisted acid digestion of the samples. The experimental parameters for solid sampling such as the maximum amount of sample on the platforms of solid autosampler, graphite furnace program were optimized. Samples were directly loaded on the platforms of solid autosampler between 0.25 and 2.0mg and lead was determined applying 800 °C for pyrolysis and 2100 °C for atomization. Under optimized conditions, interference-free determination could be performed using aqueous standards. The LOD and the characteristic mass were 21.3 and 12.6 pg, respectively. The lead in the same lipstick samples was determined after microwave-assisted acid digestion and compared with those found by solid sampling. Mostly, there was no significant difference between the lead concentrations found by the two techniques. The lead in 25 lipstick samples with different properties were 0.11-4.48 ng mg(-1) which were not significantly different from those (<0.026-7.19 ng mg(-1)) reported by FDA for around 400 samples.
authors.affiliation: Istanbul Technical University, Faculty of Science and Letters, Department of Chemistry, 34469 Maslak-Istanbul, Turkey.
authors.forename: Sema
authors.initials: S
authors.lastname: Gunduz
authors.forename: Suleyman
authors.initials: S
authors.lastname: Akman
mesh_terms: D003358:Cosmetics / Q000737:chemistry*; D006801:Humans; D007854:Lead / Q000737:chemistry*; D057230:Limit of Detection; D008046:Lip; D013054:Spectrophotometry, Atomic / Q000379:methods*; D013696:Temperature
chemical_list: D003358:Cosmetics; D007854:Lead