Hello Everyone,
extracted the fruit juice from a fresh harvested ripened fruit bu due to the shortage of time we kept our fruit sample in refrigerator for further study ( pH, sugar, acidic compounds etc).
Q 1: I want to know that is there will be any effect of temperature and time duration on Fruit Juice pH , on sugar and acidic compounds?
Q 2: should we measure these parameters as soon as or can be measure at any time ?
Yes time and temperature may affect different parameters of fruits, so you should extract these compound as early as possible or you can preserve it in minus (-)80 degree centigrade temperature.
Hi Hafiz,
As said above, you should surely measure the fruit parameters as early as possible. This is because refrigeration can only slow down the fruit physiology and not stop it completely. Moreover, if your fruit species is climecteric then the ripening process (i.e. slower ethylene production due to lower temperature) can further alter your parameters that you are seeking to know. Hope this is helpful.
It's suggested to measure the biochemical compounds in fresh fruits, but the refrigerator also can help you.
In such situation, fruit samples could be kept, at least, at -20C for a short time ( a few weeks) and off-course together with your control treatment samples. Then, even if some changes in theses parameters might occur during freezing period your comparison among treatments still possible.
The effect of temprature is depond on the natures of the fruits. As you know, some fruits are affected by chilling injury when they stored at low temprature even at short time. Thus, you have to identify the nature and varities of the fruits.
I agree with Zinabu Hailu. Some fruit like banana and other tropical fruits injury by the cold temperatures.
Storge temprature is siginficantly affects to the chemical characterstics of fruits. you can observe the TSS, pH and TAA values before and after storage, you will get significant change. you also lost temprature senstive minerals and vitamins, if you store at high or low storage temprature.
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