Initially the moisture content of fresh hog plum was 86.69%, ash 0.78%, 30.9 mg/100 g vitamin C and pH 2.70. All the parameter i.e moisture, ash, acidity and vitamin of both the pickle and chutney were more or
J. Environ. Sci. & Natural Resources, 5(2) : 67 - 72, 2012
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less different than the fresh hog plum. But among different parameter water content and vitamin C concentration was most prominently different than the fresh fruit. The moisture content of pickle was 59.69% and 43.08% for chutney. It was clear that the moisture content was reduced to near about half of the initial (86.69%) concentration for chutney and the reduction is about two third for pickle (Table 5). This finding was similar to Ponting et al. (1966) as described that 50% of the water of fruit pieces could be removed by mixing with dry sucrose or by immersion in concentrated solution. The TSS was 35.50% and 55.50% for pickle and chutney respectively. It was observed that TSS increased and vitamin C concentration decreased as storage time increased. The observation was similar for vitamin C concentration as described by Saron et al. (2007). TSS percentage increased due to loss in moisture content and this is in agreement with Barwal et al. (2005). The ash content was changed nearly twice of the initial concentration may be due to reduction in moisture of the initial volume. The pH of the pickle and chutney was more than the initial pH of hog plum. The vitamin C concentration was near about 5mg/100g sample for both the pickle and chutney which were different from initial concentration (30.9 mg/100g). This difference may be due to processing method applied. Factors responsible for vitamin C losses are: temperature, oxidation, acidity, pH and metal trace (Villota and Hawkes, 1992).The vitamin-C content of develop products were low due to the fact that vitamin-C is readily oxidized. Moreover reduction of vitamin-C follows the first order kinetic reaction and the rate constant has and Arrhenius type relationship with absolute temperature (Heldman, 1974; Augustin et al. 1979 and Islam, 1980).