Algoritmo genético e espectroscopia no infravermelho - algumas aplicações na indústria cosmética / Genetic algorithm and infrared spectroscopy - some applications in the cosmetic industry

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

A genetic algorithm was implemented in VBA for Excel and applied in combination with FTIR-ATR to develop analytical methods for some raw materials and finished products of the home care and personal care industries, like the quantification of surfactants and bactericides. Some modifications were introduced in the traditional genetic algorithm and evaluated for the mentioned applications, with emphasis on parallelism techniques that extend the algorithm to the definition of methods for more than one analyte simultaneously. The parallelistic approach was used for the quantification of o-benzil p-chloro phenol, o-phenyl phenol and ethanol in a mixture of these three components (used as bactericides in home care products). Using the genetic algorithm, FTIR-ATR and multiple linear calibration it was also possible to develop methods to quantify the active ingredient of the ammonium lauryl sulfate/ammonium lauryl ether sulfate mixture (raw material for shampoos), and the concentration of sodium lauryl ether sulfate in commercial samples of shampoos. In comparison with usual methods of analysis, like titrations, gas chromatography or liquid chromatography, the new developed methods are faster and more direct, with comparable accuracy. Furthermore, they do not require any kind of sample pretreatment nor the use of organic solvents.

ASSUNTO(S)

ftir artificial intelligence atr espectroscopia infrared genetic algorithm atr cosmetic ftir inteligência artificial infravermelho spectroscopy algorítmo genético cosméticos

ACESSO AO ARTIGO

Documentos Relacionados