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Comparative Study of the Quality of New Potatoes Imported from the Mediterranean Area

Wadas Wanda, Rymuza Katarzyna

Journal of Ecological Engineering

2019

Vol. 20, nr 5

59--68

This paper presents the comparison of the quality of new potatoes imported from the Mediterranean area during the winter-spring period. The study material included the new potatoes imported from Cyprus, Egypt, Israel, Spain and Morocco, purchased in Poland, from the beginning of February to the end of May. The laboratory analyses were performed on a total of 162 potato samples. The dry matter content in the new potatoes imported from Spain and Morocco was higher than in the potatoes originating from Cyprus, Egypt or Israel. The dry matter content in the new potatoes imported from Cyprus, Egypt, and in the majority of new potatoes imported from Israel did not differ significantly. PCA showed that the potatoes which had more dry matter contained more L ascorbic acid but less total sugars. The least L-ascorbic acid content and the lowest protein content were determined in the ‘Nicola’ potatoes imported from Israel and 'Excellency' tubers imported from Spain. The amounts of L-ascorbic acid and protein in the remaining potato samples tested were at a similar level. The potatoes of the same variety imported from different countries did not differ in terms of L-ascorbic acid content. The 'Maris Peer' tubers imported from Spain had more protein than those originating from Israel. The starch contents in new potatoes imported from Israel and Cyprus were lower compared with the tubers from Egypt, Spain and Morocco. The potatoes which had more starch had higher dry matter contents and more monosaccharides. The highest starch content was determined in the ‘Excellency’ potatoes, which represent the floury cooking type, imported from Spain or Morocco. The 'Excellency' tubers imported from Morocco had more total sugars and monosaccharides than the potatoes imported from Spain. All of the tested potato varieties had a very low susceptibility to the aftercooking darkening.