A survey of nitrate and nitrite content of fruit and vegetables grown in Slovenia during 1996-2002 |
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Authors: | Janez Su in Veronika Kmecl Ana Gregor
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Affiliation: |
a Agricultural Institute of Slovenia, Ljubljana, Slovenia |
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Abstract: | Monitoring of nitrate (NO3-) and nitrite (NO2-) content in agricultural products in Slovenia has been carried out since 1996. The results of monitoring over the period 1996-2002 are presented. During this time 924 samples of 14 different agricultural products (potato, lettuce, apples, carrot, silage maize, cabbage, grapes, peaches, string beans, cereals, pears, cucumbers, strawberries and tomato) were analysed. The samples were taken at the time of maturity directly from growing sites and they were analysed using segmented flow analysis. The average nitrate contents were the highest in lettuce (1074?mg?kg-1), cabbage (881?mg?kg-1), string beans (298?mg?kg-1) and carrot (264?mg?kg-1), and they were moderately high in potato (158?mg?kg-1), silage maize (122?mg?kg-1), strawberries (94?mg?kg-1), cucumbers (93?mg?kg-1) and cereals (49?mg?kg-1). Low nitrate contents (below 6?mg?kg-1) were found in fruit (grapes, peaches, apples and pears) and tomato. With the exception of cereals (8.9?mg kg-1), apples (1.5?mg?kg-1), potato (1.2?mg?kg-1) and pears (1.0?mg?kg-1) the content of nitrites did not exceed 0.5?mg?kg-1. It may be concluded that the results of the monitoring were in most cases similar to the results of investigations obtained in other countries. |
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Keywords: | Nitrate nitrite vegetables field crops fruit monitoring |
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