Vitamin C retention depended significantly (p < 0.05) on
the electric field strength, the treatment time, the pulse frequency,
the pulse width and the pulse polarity used during
HIPEF-processing of the samples (p < 0.05). The lower the
electric field strength and the treatment time, the higher
was the vitamin C retention in both orange juice and gazpacho
(Figs. 1, 2). Figs. 1 and 2 also show that vitamin C
retention was greater when HIPEF treatment of orange
juice and gazpacho was conducted in bipolar rather than
in monopolar mode. The retention of vitamin C in orange
juice and gazpacho increased with a decrease of pulse frequency
(Fig. 3). In the same way, the shorter the pulse
width, the greater was the vitamin C retention (Fig. 4).
To sum up, when the HIPEF-processing parameters
increased in severity, vitamin C retention was lower. Therefore,
minimal processing of foods to assure the microbial
stability, as well as the original sensorial and nutritional
characteristics of the food, making it more convenient
and healthy, is gaining importance.
Vitamin C retention depended significantly (p < 0.05) onthe electric field strength, the treatment time, the pulse frequency,the pulse width and the pulse polarity used duringHIPEF-processing of the samples (p < 0.05). The lower theelectric field strength and the treatment time, the higherwas the vitamin C retention in both orange juice and gazpacho(Figs. 1, 2). Figs. 1 and 2 also show that vitamin Cretention was greater when HIPEF treatment of orangejuice and gazpacho was conducted in bipolar rather thanin monopolar mode. The retention of vitamin C in orangejuice and gazpacho increased with a decrease of pulse frequency(Fig. 3). In the same way, the shorter the pulsewidth, the greater was the vitamin C retention (Fig. 4).To sum up, when the HIPEF-processing parametersincreased in severity, vitamin C retention was lower. Therefore,minimal processing of foods to assure the microbialstability, as well as the original sensorial and nutritionalcharacteristics of the food, making it more convenientand healthy, is gaining importance.
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