Mostrando 1 - 2 Resultados de 2 Para Buscar 'Laguna G., Lizabeth S.', tiempo de consulta: 0.03s Limitar resultados
1
artículo
In this research study, the concentration of arsenic and lead was determined in eight different brands of lipsticks that are marketed in Metropolitan Lima. Materials and methods Non-experimental cross-sectional design the analytical method used was atomic absorption spectroscopy with a graphite furnace, the analysis of variance was applied to compare multiple means (ANOVA) considering p <0.05 for significance and the Student t-test . Samples were collected randomly in shopping centers and analyzed at the Chemical Analysis Services Unit (USAQ). results, lead values range from 0 ppm to 71.96 ppm, the average concentration being 6.60 ppm, 12.5% of the samples exceed the maximum permissible limits (LMP) of 10 ppm recommended by the Food and Drug Administration (FDA), Values for arsenic range from 0 ppm to 16.59 ppm, the average concentration is 3.34ppm, and 40.6% of the total samples exce...
2
artículo
In this research study, the concentration of arsenic and lead was determined in eight different brands of lipsticks that are marketed in Metropolitan Lima. Materials and methods Non-experimental cross-sectional design the analytical method used was atomic absorption spectroscopy with a graphite furnace, the analysis of variance was applied to compare multiple means (ANOVA) considering p <0.05 for significance and the Student t-test . Samples were collected randomly in shopping centers and analyzed at the Chemical Analysis Services Unit (USAQ). results, lead values range from 0 ppm to 71.96 ppm, the average concentration being 6.60 ppm, 12.5% of the samples exceed the maximum permissible limits (LMP) of 10 ppm recommended by the Food and Drug Administration (FDA), Values for arsenic range from 0 ppm to 16.59 ppm, the average concentration is 3.34ppm, and 40.6% of the total samples exce...