https://repositorio.ufba.br/handle/ri/14355
Tipo: | Artigo de Periódico |
Título: | A sensitive flow analysis system for the fluorimetric determination of low levels of formaldehyde in alcoholic beverages |
Título(s) alternativo(s): | Talanta |
Autor(es): | Oliveira, Fábio Santos de Sousa, Eliane Teixeira Andrade, Jailson Bittencourt de |
Autor(es): | Oliveira, Fábio Santos de Sousa, Eliane Teixeira Andrade, Jailson Bittencourt de |
Abstract: | A sensitive FIA method was developed for the selective determination of formaldehyde in alcoholic beverages. This method is based on the reaction of Fluoral-P (4-amine-3-pentene-2-one) with formaldehyde, leading to the formation of 3,5-diacetyl-1,4-dihydrolutidine (DDL), which fluoresces at λex = 410 nm and λem = 510 nm. The analytical parameters were optimized by the response surface method using the Box–Behnken design. The proposed flow injection system allowed for the determination of up to 3.33 × 10−5 mol L−1 of formaldehyde with R.S.D. < 2.5% and a detection limit of 3.1 ng mL−1. The method was successfully applied to determine formaldehyde in alcoholic beverages, without requiring any sample pretreatment, and the results agreed with the reference at a 95% confidence level by paired t-test. In the optimized condition, the FIA system proved able to analyze up to 60 samples/h. |
Palavras-chave: | Formaldehyde determination Alcoholic beverages Fluoral-P Box–Behnken design |
Tipo de Acesso: | Acesso Aberto |
URI: | http://repositorio.ufba.br/ri/handle/ri/14355 |
Data do documento: | 2007 |
Aparece nas coleções: | Artigo Publicado em Periódico (Química) |
Arquivo | Descrição | Tamanho | Formato | |
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1-s2.0-S0039914007002779-main.pdf | 580,81 kB | Adobe PDF | Visualizar/Abrir |
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