Journal
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
Volume 22, Issue 6, Pages 551-555Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jfca.2008.11.007
Keywords
Nitrates; Potato; Solanum tuberosum; Cultivar variation; Harvest date; Off-season crop; Food safety; Food composition
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The influence of potato variety and harvest date was investigated on tuber nitrate content for off-season production in three varieties: Arinda (mid-early), Spunta (mid-late) and Mondial (late) Samples of. tubers were harvested at 90,105 and 120 days after planting in winter-spring crop and at 80, 95 and 110 days after planting in summer-autumn crop. Tuber nitrate content was determined by ion selective electrode (ISE) method. Investigated varieties differed in nitrate content. In both off-season crops, the highest quantities of nitrate were contained in the late Mondial, with respect to the middle early Arinda variety and Spunta. After a delay of the harvest date, nitrate contents in the investigated tuber samples significantly decreased in winter-spring crop, whereas they increased in summer-autumn crop in the three varieties, but to the greatest extent in the case of late Mondial variety. Regardless of variety and harvest time, the content of nitrate in tubers was within the guidelines proposed by some European countries. (C) 2008 Elsevier Inc. All rights reserved.
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