Gold kiwifruit pomace (200 g) was mixed with 600 mL of 1.0%
(w/v) citric acid (CA) solution of pH 2.20 ± 0.01 (1:3 w/v pomace
to acid solution ratio) in a container and the mixture (pH
3.1 ± 0.05) was heated in a 50 C water bath for 60 min under continuous
stirring.