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http://dx.doi.org/10.3746/jkfn.2016.45.10.1518

Prevention of Quality Deterioration in Concentrated Strawberry Puree by Employing pH Regulators during Heat Treatment  

Lee, In-Gyeong (Department of Food Engineering, Dankook University)
Min, Seo-Cheol (Department of Food Science and Technology, Seoul Women's University)
Kim, Hee-Sun (National Academy of Agricultural Science, Rural Development Administration)
Han, Gwi-Jung (National Academy of Agricultural Science, Rural Development Administration)
Kim, Myung-Hwan (Department of Food Engineering, Dankook University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.45, no.10, 2016 , pp. 1518-1524 More about this Journal
Abstract
This study was performed to minimize quality degradation of concentrated strawberry puree after $90^{\circ}C$ for 5 min by heat treatment with citric acid (CA) and acidic sodium metaphosphate (ASM) as pH modifiers. The highest color value was 1% CA+1% ASM (13.027), followed by 1% CA (9.539) and control (6.905). Anthocyanin contents were also 1% CA+1% ASM (3.049 mg/100 g), 1% CA (1.140 mg/100 g), and control (0.757 mg/100 g) in sequence. The DPPH radical scavenging activities of control, 1% CA, and 1% CA+1% ASM were 58.148, 72.638, and 83.736%, respectively. The color values, anthocyanin contents, and DPPH radical scavenging activities were significantly different at P<0.05 between control and 1% CA+1% ASM treatment. For the results of overall preference for hedonic test, there was no significant difference at P>0.05 among the three samples. During heat treatment, quality degradation of concentrated strawberry puree was reduced by 1% CA+1% ASM treatment, which is expected for new acidulants.
Keywords
concentrated strawberry puree; citric acid; acidic sodium metaphosphate; anthocyanin; heat treatment;
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