Factorial Experimental Design Optimization of Solid Phase Microextraction (SPME) Conditions for Analysis of Butylated Hydroxytoluene (BHT) in Bottled Water
نویسندگان
چکیده
BHT é um antioxidante usado como aditivo em alguns alimentos e em plásticos de embalagens, e sua presença em água mineral engarrafada é possível devido à migração do aditivo contido nas paredes do recipiente. Planejamento fatorial foi empregado para determinar os valores ótimos para os parâmetros operacionais principais na análise de hidroxitolueno butilado (BHT) em água engarrafada usando microextração em fase sólida (SPME) direta e em headspace na etapa de pré-concentração. Os parâmetros otimizados foram pH, temperatura e força iônica da amostra. A separação, detecção e quantificação dos extratos foi efetuada por cromatografia gasosa acoplada a espectrometria de massas. Experimentos preliminares foram realizados para selecionar a melhor fibra para o procedimento de extração. Fibras de polidimethilsiloxano (PDMS) foram selecionadas, e a metodologia otimizada aplicada com sucesso na extração e quantificação de BHT em amostras reais de água mineral e mineralizada engarrafada.
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