Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/75084
Title: Evaluation of nitrate contents in regulated and non-regulated leafy vegetables of high consumption in the Canary Islands, Spain: Risk assessment
Authors: Martín León, Carmen Verónica 
Pérez Luzardo, Octavio Luis 
UNESCO Clasification: 3214 Toxicología
320611 Toxicidad de los alimentos
Keywords: Arugula
Chard
Intake Estimation
Rocket
Spinach
Watercress
Issue Date: 2020
Journal: Food and Chemical Toxicology 
Abstract: The nitrate content of the most consumed green leafy vegetables in the European Region of the Canary Islands was determined. The sampling included chard and watercress, which are not regulated but highly consumed in this region. The levels of nitrates in organic vegetables were significantly higher than those of conventional cultivation. However, no seasonal differences were observed, and overall nitrate levels were lower than those reported in other studies. Median nitrate levels in the analyzed vegetables were: lettuce (3 varieties) = 573.7 mg/kg; ready-to-eat salad mixes = 595.0 mg/kg; spinach = 1044.2 mg/kg; arugula = 3144.2 mg/kg; watercress = 450.5 mg/kg; and chard = 1788.4 mg/kg. In general, the nitrate levels of watercress and chard were significantly higher than those of regulated vegetables with similar culinary uses. The average per capita daily intake of nitrates through regulated vegetables was 17.5–32.5% of acceptable daily intake (ADI). On the contrary, the consumption of unregulated vegetables in this archipelago represents a similar, or even higher, percentage of ADI (23.6–44.3%). We, therefore, consider that the establishment of maximum limits of nitrate by the EU regulatory authorities would be appropriate for chard and watercress and similar to those set for spinach.
URI: http://hdl.handle.net/10553/75084
ISSN: 0278-6915
DOI: 10.1016/j.fct.2020.111812
Source: Food and Chemical Toxicology [ISSN 0278-6915], v. 146, (Diciembre 2020)
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