Study of the volume and life of juice in Ortanique

Full study

The purpose of this study is to determine, for each type of treatment, the volume obtained from a specific quantity of Ortanique orange and the life of these by studying the amount of galacturonase present.

By comparing the starting weight and the amount of juice obtained, we can obtain the percentage of juice with respect to the total fruit. This comparison between the different samples shows that the sample B (35.38% of juice on average) has a greater amount of juice than sample A (29.95% of juice on average) and, therefore, sample A has a higher percentage of skin and pulp (over 70% on average) than sample B (over 64%)

For Brix grades, the values obtained in the three cases of sample B are higher than| sample A at approximately 3 points. In both cases, refrigerated samples tend to decrease less.

As regards pH and EC, both samples are. very similar, with sample A having a higher pH compared to sample B and sample B having a higher EC compared to sample A.
In both types of samples, the passage of time and cooling of the sample hardly changes the values obtained.

In terms of total nitrogen concentrations, this is directly proportional to the amount of galacturonase present in the fruit, an enzyme that accelerates the degradation of the fruit, making the shelf life of the fruit less to more total nitrogen.

Thus, when comparing the concentrations of total nitrogen, it is observed that sample B presents a higher initial concentration of nitrogen. Total (Nr), but this remains more. constant over time (it suffers in its highest part an increase of 102% over the initial), both once obtained the juice and over time in the fruit without squeezing.

Sample A, on the other hand, is part of a lower concentration of Total Nitrogenous (NT), but this shows an increase of 527% compared to the initial one.

For this reason, the fruit tends to degrade more early, showing in Annex Il the presence of oranges already decomposed, while the oranges in sample B apparently remain the same as the first day.


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