Quantification and in vitro bioaccessibility of glucosinolates and trace elements in Brassicaceae leafy vegetables

Leaf samples from five Brassicaceae species (Brassica carinata, Brassica oleracea, rapa, Eruca vesicaria and Sinapis alba) were analyzed to determine their contents of glucosinolates trace elements, the bioaccessibility these compounds. Considerable variability in total glucosinolate profiles was observed species, with amounts ranging 8.5 µmol/g dw oleracea 32.9 alba. Bioaccessibilities predominant moderate, 13.1% for glucoraphanin 43.2% gluconapin, which is particularly relevant as they have been implicated a variety anti-carcinogenic mechanisms. Trace element concentrations were: Se (28–160 µg/Kg dw); Cr (0.31–4.03 µg/g Ni (0.19–1.53 Fe (8.6–18.8 Zn (20.8–41.5 Ca (6.2–15.2 mg/g dw). leaves also moderate dietary sources Se, Ni, Ca.