Zawartosc azotanow[V] i azotanow[III] w roslinach straczkowych

Oznaczono zawartość azotanów(V) i azotanów(III) w suchych nasionach roślin strączkowych, świeżych strąkach fasoli szparagowej, produktach konserwowych oraz mrożonkach zakupionych w handlu detalicznym na terenie Trójmiasta. Dokonano porównania oznaczonych stężeń z aktualnie obowiązującym ustawodawstwem oraz oceniono pobranie tych związków z analizowanymi produktami.

The aim of the present work was to analyse concentrations of nitrites and nitrates in legume seeds (beans, peas, broad bean, lentil, chickpea, soybean), string-beans, sprouts of pea and mung bean, in the form of dry seeds, canned and frozen products. The compounds were determined according to Griess reaction after previous reduction of nitrates to nitrites by cadmium. The contents of nitrites in dry seeds ranged from 1.23 to 2.39 mg/kg, in canned products from 1.48 to 3.33 mg/kg and in frozen products from 0.48 to 2.35 mg/kg, in terms of sodium nitrite. The highest level of nitrates was determined in the frozen green string-beans, while the lowest in the canned sprouts of pea. The mean intake of nitrite was between 0.3 and 2.4 of the ADI. The estimated mean intake of nitrates ranged from 0.3 to 5.4 of ADI.