RI UFBA >
Instituto de Química >
Artigos Publicados em Periódicos (Quimica) >
Please use this identifier to cite or link to this item:
|Title: ||Determination of formaldehyde in Brazilian alcohol fuels by flow-injection solid phase spectrophotometry|
|Other Titles: ||Talanta|
|Authors: ||Teixeira, Leonardo Sena Gomes|
Leão, Elsimar S.
Dantas, Alailson Falcão
Pinheiro, Heloísa Lúcia C.
Costa, Antonio Celso Spinola
Andrade, Jailson Bittencourt de
|Keywords: ||Formaldehyde;Solid phase spectrophotometric;Fluoral P;Ethanol fuel|
|Issue Date: ||2004|
|Abstract: ||In thiswork, a solid phase spectrophotometric method in association with flowinjection analysis for formaldehyde determination has been developed
with direct measurement of light-absorption in C18 material. The 3,5-diacetyl-1,4-dihydrolutidine produced from the reaction between formaldehyde and fluoral P was quantitatively retained on C18 support and the spectrophotometric detection was performed simultaneously at 412 nm. The retained complex was quickly eluted from C18 material with the eluent stream consisting of a 50% (v/v) ethanol solution. The
results showed that the proposed method is simple, rapid and the analytical response is linear in the concentration range of 0.050–1.5 mg L−1. The limit of detection was estimated as 30 gL−1 and the R.S.D. 2.2% using a sample volume of 625 L. The system presented an analytical throughput of 20 determinations per hour. The method was successfully applied in the determination of formaldehyde in ethanol fuel.© 2004 Elsevier B.V. All rights reserved.|
|Description: ||p. 711–715|
|Appears in Collections:||Artigos Publicados em Periódicos (Quimica)|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.