NA =sample not analysed due to unacceptability.
Cnt, dipped; Coa, dipped and coated with alginate; Coa500, dipped and coated with alginate loaded with 500 ppm of ascorbic acid; Coa1000, dipped and coated with alginate loaded with 1000 ppm of ascorbic acid; Coa1500, dipped and coated with alginate loaded with 1500 ppm of ascorbic acid.