Dear Researcher,
I am working on passion fruit juice, I have extracted fruit juice and kept in 4 oC, and i will measure sugar, acids and other nutritional contents from fruit juice after about 1 month.
1: i would like to know that this temperature is ok or not for the measurement of sugar, acids and nutritional contents from juice ?
2: Should i use the fresh juice or i should do Centrifuge the samples and keep in -40 or -80 oC for further analysis ?
3: If i will keep in -40 or -80 oC so when i will use so at that time how i should de-freez the samples? by using which method?
I am looking forward to your suggesions
Most likely, there will be mould growth during prolonged storage at 4 C. Frozen storage -18 or lower is recommended. Thawing can be for 12- 24 hours at 4 C, depending on storage temperature and sample size.
Hi Hafiz,
Prolonged storage of the juice at 4 degrees may lead to alcoholic fermentation due to microbial growth which will affect the nutritional content. Analysis with fresh samples would yield better results, however under different circumstances, storage at lower temperatures would be better.
-Bhuwan
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