Percorrer por autor "Pais, Teresa F. M."
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- Gas-diffusion sequential injection enzymatic determination of ethanol in wines: study of matrix effects derived from direct sample intoductionPublication . Pais, Teresa F. M.; Vidigal, Susana S. M. P.; Tóth, Ildikó V.; Rangel, António O. S. S.
- Gas-diffusion sequential injection enzymatic determination of ethanol in wines: study of matrix effects derived from direct sample introductionPublication . Pais, Teresa F. M.; Vidigal, Susana S. M. P.; Tóth, Ildikó V.; Rangel, António O. S. S.
- Sequential injection system for the enzymatic determination of ethanol in alcoholic beverages with in-line dilutionPublication . Pais, Teresa F. M.; Vidigal, Susana S. M. P.; Tóth, Ildikó V.; Rangel, António O. S. S.A sequential injection system for the enzymatic determination of ethanol in wines with spectrophotometric detection was developed. The determination was based on the enzymatic reaction involving ethanol and NAD(+) in the presence of alcohol dehydrogenase. A gas-diffusion unit was introduced in the system to perform an in-line dilution. It was possible to operate the system with a reagent consumption of 1.3 mg of NAD(+), 0.45 U of ADH, and 32 mu L of sample, per assay with a determination rate of 21 h(-1). The results obtained from the analysis of wine samples were statistically equivalent to those obtained by the reference method, with good repeatability; the relative standard deviation (n = 10) was <1% with a LOQ of 0.3% (v/v). (C) 2012 Elsevier Ltd. All rights reserved.
- Strategies for the enzymatic determination of ethanol in beverages using flow based approachesPublication . Vidigal, Susana S. M. P.; Pais, Teresa F. M.; Páscoa, Ricardo N. M. J.; Tóth, Ildikó V.; Rangel, António O. S. S.
- Strategies for the enzymatic determination of ethanol in beverages using flow based approachesPublication . Vidigal, Susana S. M. P.; Pais, Teresa F. M.; Páscoa, Ricardo N. M. J.; Tóth, Ildikó V.; Rangel, António O. S. S.