The optimized conditions were applied for Cu and Fe determination
in five samples of red wine samples and three samples of white wine,
as shown in Table 1. Prior to the determination, samples were 3 and 60
times diluted for Cu and Fe determination, respectively. In general, Cu
and Fe concentration in red and white wine samples ranged from 21.9
to 178 μg L−1 and from 1.38 to 1.74 mg L−1, respectively. These values
were about 10 times lower than the maximum concentration established
by the Brazilian legislation. The typical analytical signals for red wine,
white wine and reference solutions of Cu and Fe are shown in Fig. 2. It
is important to mention that, even for some measurements where the
background signal was relatively high (from 0.1 to 0.2 peak high), the
background correction by the D2 lamp was efficient.
Due to the lack of certified reference material for element determination
in wine, the accuracy was evaluated by the determination of Cu
and Fe by ICP OES after MAD procedure. As can be seen in Table 1, the
agreement with the proposed method ranged from 91 to 110% for Cu
and from 89 to 113% for Fe.
The optimized conditions were applied for Cu and Fe determination
in five samples of red wine samples and three samples of white wine,
as shown in Table 1. Prior to the determination, samples were 3 and 60
times diluted for Cu and Fe determination, respectively. In general, Cu
and Fe concentration in red and white wine samples ranged from 21.9
to 178 μg L−1 and from 1.38 to 1.74 mg L−1, respectively. These values
were about 10 times lower than the maximum concentration established
by the Brazilian legislation. The typical analytical signals for red wine,
white wine and reference solutions of Cu and Fe are shown in Fig. 2. It
is important to mention that, even for some measurements where the
background signal was relatively high (from 0.1 to 0.2 peak high), the
background correction by the D2 lamp was efficient.
Due to the lack of certified reference material for element determination
in wine, the accuracy was evaluated by the determination of Cu
and Fe by ICP OES after MAD procedure. As can be seen in Table 1, the
agreement with the proposed method ranged from 91 to 110% for Cu
and from 89 to 113% for Fe.
การแปล กรุณารอสักครู่..
