The hydrophilic antioxidant activity of unprocessed broccoli
was substantially higher than that of carrots and green beans
(both P b 0.001). High pressure treatment had differential
effects on water soluble antioxidant activity depending on
vegetable type (Table 1). For broccoli HPP had no effect on
antioxidant activity. For carrots there was a modest reduction in
antioxidant activity at the lower pressure level (400 MPa),
whereas for green beans, water soluble antioxidant activity was
increased by pressure treatment at both levels (400 & 600 MPa).
The between-sample coefficient of variation was noticeably
larger for carrots compared to beans and broccoli.