Results have shown that the proposed analytical method is
selective, accurate, repeatable and linear over the EC concentration
range (3.4–88.5 lg L1). Major advantages over the standard AOAC/
OIV procedure include: (1) reduced work effort and time due to the
automated evaporation; (2) use of a less toxic extraction solvent,
and (3) use of an internal standard (EC-d5) with a higher degree
of similarity to control extraction and chromatographic responses.
Besides theses advantages, EC concentrations were shown to be stable
in the ethereal wine eluates when stored for 30 days at 20 C,
providing greater time flexibility for the GC–MS–SIM analyses. On
the other hand, the proposed procedure may be further improved
by trying to reduce the amount of solvents (n-pentane and diethyl
ether) and the storage time at 20 C (required to remove residual
moisture as ice from ethereal eluates).
Our sample collective was too small to draw conclusions about
the situation of EC in Brazilian table wines. However, considering
the good performance and validation results obtained in the proposed
procedure, another study is currently underway to expand
the EC assessment to table wines produced in São Francisco Valley,
Northeast Brazil.
Results have shown that the proposed analytical method is
selective, accurate, repeatable and linear over the EC concentration
range (3.4–88.5 lg L1). Major advantages over the standard AOAC/
OIV procedure include: (1) reduced work effort and time due to the
automated evaporation; (2) use of a less toxic extraction solvent,
and (3) use of an internal standard (EC-d5) with a higher degree
of similarity to control extraction and chromatographic responses.
Besides theses advantages, EC concentrations were shown to be stable
in the ethereal wine eluates when stored for 30 days at 20 C,
providing greater time flexibility for the GC–MS–SIM analyses. On
the other hand, the proposed procedure may be further improved
by trying to reduce the amount of solvents (n-pentane and diethyl
ether) and the storage time at 20 C (required to remove residual
moisture as ice from ethereal eluates).
Our sample collective was too small to draw conclusions about
the situation of EC in Brazilian table wines. However, considering
the good performance and validation results obtained in the proposed
procedure, another study is currently underway to expand
the EC assessment to table wines produced in São Francisco Valley,
Northeast Brazil.
การแปล กรุณารอสักครู่..
