Experimental determination of electrical conductivity of selected fruit juices | |
| Author | Gupta, Vineet |
| Call Number | AIT Thesis no. AE-92-10 |
| Subject(s) | Fruit juices Electric conductivity |
| Note | A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | A test cell was constructed to measure the electrical conductivity of the fruit juices. The calibration of the cell was done with NaCl solution of different concentrations. The electrical conductivity of the three fruit juices (tomato, orange and pineapple) was detennined at different temperatures and total soluble solids (TSS) levels. The electrical conductivity increased with an increase in the temperature and TSS. The electrical conductivity of tomato juice varied from 0.4 to 2.65 S/m as the TSS increased from 4.0 to 13.5 °B1ix in the temperature range of 25 to 80 °C. Similarly, in case of orange juice the electrical conductivity varied from 0.3 to 1.56 S/m as the TSS increased from 11.5 to 24 °Brix. For pineapple juice the electrical conductivity was lowest and varied from 0.2 to 1.06 Sim as the TSS increased from 15.5 to 29.0 °Brix. The presence of total insoluble solids (TIS) resulted in a decrease in the electrical conductivity of the fruit juices. The electrical conductivity decreased about 40 to 56 % depending upon the temperature when TIS increased from 0 to 1 % on dry weight basis in case of tomato juice. Similar trends were exhibited by the pineapple and orange juices showing a decrease of about 40 to 48 % and 30 to 32 %, respectively. In general, the tomato juice was most sensitive to the changes in experimental variables and was followed by pineapple and orange juices in decreasing order. |
| Year | 1992 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Jindal, Vinod Kumar |
| Examination Committee(s) | Illangantileke, Sarath G. ;Athapol Noomhorm ;Maohua, Wang |
| Scholarship Donor(s) | The Royal Government of Norway; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1992 |