@article{HerreroMartín:15313,
author = "Herrero Martín, Javier and Ferreira González, Vicente",
title = "{Protocolización del análisis de aldehídos de
oxidación en vinos españoles y su relación con diversos
parámetros composicionales y de almacenamiento}",
year = "2014",
note = "Abstract Aldehydes and ketones are molecular groups with
greatest sensory diversity in wine. Oxidative degradation
associated with these compounds leads to a rapid loss of
the aromatic qualities of the wine and the formation of
other flavors that are associated with spoiled wine. It can
be stated that the life of a wine ends when the aroma of
certain carbonyls predominates over the rest. The analysis
of these compounds presents a challenge, as they are very
volatile and reactive, capable of forming strong
interactions with other molecules, among which stands out
SO2. Because of that, the determination of both free and
bound forms of these compounds is crucial. This is achieved
by using surrogate molecules, whose behavior is very
similar to the analytes, and by analysis using a
HS-SPME-GC-MS method. In order to ensure that the
estimations are right the concentrations of the surrogates
should be known accurately. As analytes, internal standards
and surrogates can be degraded despite of the use of
thorough preservation and manipulation measures, the
shelf-life of working solutions with those families of
compounds should be assessed. Consequently a solution with
the compounds of interest was prepared and stored and used
following thorough standard procedures along 75 days. The
stability of the compounds in the solution was assessed by
its analytical control, with a total of 32 measurements
evenly distributed along the 75 days. Different plots of
absolute or relative areas versus time were made and
different statistical techniques were applied in order to
assess the degradation rate of the different compounds.
Compounds could be satisfactorily classified into four
different groups of similar stabilities. The practical
outcome of this work is the proposal of splitting mother
solutions into the 4 different groups of stability (1 week,
2 weeks, 1 month, 2 months), minimizing experimental effort
and preserving the method quality.",
}