You need JavaScript to view this

Validation of the methodology for the quantitative determination of lead in cosmetics dyes available in the national market by atomic absorption spectroscopy with flame; Validacion de la metodologia para la determinacion cuantitativa de plomo en tintes cosmeticos disponibles en el mercado nacional por espectroscopia de absorcion atomica con llama

Abstract

The analytical methodology was validated to quantify lead in cosmetics dyes available on the national market, by the method of atomic absorption spectroscopy with flame. The samples were digested by wet digestion with HNO{sub 3} to 65% m/m in a microwave oven, the percentage of recovery for the digestion of samples of 0,25 g and 0,45 g in 5,00 mL was of 100,5{+-}0,5. The field of optimal linearity detection limit was 5,0 mg/L with a correlation coefficient of 0,9998. The limits of detection and quantification limits determined graphically by the method of row errors for linear regression of 0,12{+-}0,02 mg/L and 0,21{+-}0,02 mg/L, respectively. Precision was evaluated determining the repeatability as standard deviation of five replicas of a positive dye for lead, according to the definition of the ISO, 2{radical}2*, and obtained a value of 2,3. The veracity was determined through percentages of recovery assessed, adding aliquots of lead patterns to dye samples and compared with the same mass to which they are not make additions. The dye samples were obtained at point of sale, such as pharmacies, beauty suppliers, supermarkets, sales of natural products and the central market of San Jose. The dyes tested contain lead acetates active ingredient,  More>>
Authors:
Silva Trejos, Paulina , E-mail: stpaulinita@gmail.com [1] 
  1. Univ. de Costa Rica, Escuela de Quimica, telefono 2511-4870, fax 2253-5020 (Costa Rica)
Publication Date:
Jul 15, 2008
Product Type:
Journal Article
Resource Relation:
Journal Name: Tecnologia en Marcha; Journal Volume: 21; Journal Issue: 3; Other Information: Figs., tab., refs
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; ACETATES; CONSUMER PRODUCTS; DYES; EXPERIMENTAL DATA; GAMMA SPECTROSCOPY; HAIR; LEAD; RADIOACTIVE WASTES; RADIOISOTOPES; RESIDUES; WASTE PROCESSING
OSTI ID:
21302917
Country of Origin:
Costa Rica
Language:
Spanish
Other Identifying Numbers:
Journal ID: ISSN 0379-3982; TRN: CR1000008046940
Availability:
Also available from Biblioteca Luis Demetrio Tinoco, Universidad de Costa Rica;INIS
Submitting Site:
INIS
Size:
page(s) 42-46
Announcement Date:
Jun 10, 2010

Citation Formats

Silva Trejos, Paulina , E-mail: stpaulinita@gmail.com. Validation of the methodology for the quantitative determination of lead in cosmetics dyes available in the national market by atomic absorption spectroscopy with flame; Validacion de la metodologia para la determinacion cuantitativa de plomo en tintes cosmeticos disponibles en el mercado nacional por espectroscopia de absorcion atomica con llama. Costa Rica: N. p., 2008. Web.
Silva Trejos, Paulina , E-mail: stpaulinita@gmail.com. Validation of the methodology for the quantitative determination of lead in cosmetics dyes available in the national market by atomic absorption spectroscopy with flame; Validacion de la metodologia para la determinacion cuantitativa de plomo en tintes cosmeticos disponibles en el mercado nacional por espectroscopia de absorcion atomica con llama. Costa Rica.
Silva Trejos, Paulina , E-mail: stpaulinita@gmail.com. 2008. "Validation of the methodology for the quantitative determination of lead in cosmetics dyes available in the national market by atomic absorption spectroscopy with flame; Validacion de la metodologia para la determinacion cuantitativa de plomo en tintes cosmeticos disponibles en el mercado nacional por espectroscopia de absorcion atomica con llama." Costa Rica.
@misc{etde_21302917,
title = {Validation of the methodology for the quantitative determination of lead in cosmetics dyes available in the national market by atomic absorption spectroscopy with flame; Validacion de la metodologia para la determinacion cuantitativa de plomo en tintes cosmeticos disponibles en el mercado nacional por espectroscopia de absorcion atomica con llama}
author = {Silva Trejos, Paulina , E-mail: stpaulinita@gmail.com}
abstractNote = {The analytical methodology was validated to quantify lead in cosmetics dyes available on the national market, by the method of atomic absorption spectroscopy with flame. The samples were digested by wet digestion with HNO{sub 3} to 65% m/m in a microwave oven, the percentage of recovery for the digestion of samples of 0,25 g and 0,45 g in 5,00 mL was of 100,5{+-}0,5. The field of optimal linearity detection limit was 5,0 mg/L with a correlation coefficient of 0,9998. The limits of detection and quantification limits determined graphically by the method of row errors for linear regression of 0,12{+-}0,02 mg/L and 0,21{+-}0,02 mg/L, respectively. Precision was evaluated determining the repeatability as standard deviation of five replicas of a positive dye for lead, according to the definition of the ISO, 2{radical}2*, and obtained a value of 2,3. The veracity was determined through percentages of recovery assessed, adding aliquots of lead patterns to dye samples and compared with the same mass to which they are not make additions. The dye samples were obtained at point of sale, such as pharmacies, beauty suppliers, supermarkets, sales of natural products and the central market of San Jose. The dyes tested contain lead acetates active ingredient, these are: Doni, Mont D'Or, Matador y Siempre Joven; they are produced locally, Youthair brand and American manufacturing. (author) [Spanish] La metodologia analitica fue validada para determinar cuantitativamente el plomo en tintes cosmeticos disponibles en el mercado nacional, por el metodo de espectroscopia de absorcion atomica con llama. Las muestras se dirigieron por digestion humeda con HNO{sub 3} al 65% m/m en horno de microondas; el porcentaje de recuperacion para la digestion de muestras de 0,25 g y 0,45 g en 5,00 mL fue de 100,5{+-}0,5. El ambito de linialidad optimo fue del limite de deteccion de 5,0 mg/L con un coeficiente de correlacion de 0,9998. Los limites de deteccion y los limites de cuantificacion determinados graficamente por el metodo de corredor de errores para regresion lineal de 0,12{+-}0,02 mg/L y 0,21{+-}0,02 mg/L, respectivamente. La precision fue evaluada determinando la repetitividad como desviacion estandar de 5 replicas de un tinte positivo para plomo, de acuerdo con la definicion de la ISO, 2{radical}2*, y se obtuvo un valor de 2,3. La veracidad se determino por medio de los porcentajes de recuperacion evaluados, agregando alicuotas de patrones de plomo a muestras de tinte y comparandolo con muestras de igual masa a las que no se les realizo adicion. Las muestras de tintes se obtuvieron en puestos de venta, tales como farmacias, suplidoras de belleza, supermercados, centros de ventas de productos naturales y el mercado central de San Jose. Los tintes analizados contienen acetato de plomo como ingrediente activo, estos son: Doni, Mont D'Or, Matador y Siempre Joven; son producidos localmente, de marca Youthair y fabricacion norteamericana. (autor)}
journal = []
issue = {3}
volume = {21}
place = {Costa Rica}
year = {2008}
month = {Jul}
}