| Abstract | Grah mahunar (Phaseolus vulgaris L.) je jednogodišnja biljna vrsta iz porodice mahunarki (Fabaceae). Plodovi graha mahunara su mahune koje imaju iznimnu nutritivnu vrijednost i bogate su proteinima, ugljikohidratima, vlaknima, vitaminima i mineralima. Cilj ovog rada bio je utvrditi kako način uzgoja utječe na sadržaj mikroelemenata te hranidbenu vrijednost mahuna na temelju zastupljenosti mikroelemenata u mahunama. Uzorci mahuna prikupljeni su u gradu Zagrebu na tri tržnice, tri trgovačka lanca te tri trgovine ekološkim proizvodima. Nakon sušenja i homogeniziranja uzorci su razgrađeni djelovanjem koncentrirane HNO3 i HClO4 u mikrovalnoj peći, a koncentracije željeza, cinka, mangana i bakra određene su atomskim apsorpcijskim spektrometrom. Vrijednost suhe tvari u mahunama kretala se između 6,74 i 12,54 %. Udio mikroelemenata u suhoj tvari mahuna (mg/kg ST) iznosio je Fe 49,86-188,9, Zn 23,43-43,47, Mn 2,53-42,3, Cu 6,57-9,74, a u svježoj tvari (mg/100 g svježe tvari) Fe 0,49-1,96, Zn 0,19-0,42, Mn 0,03-0,32 i Cu 0,05-0,11. Najveće prosječne količine željeza, cinka i mangana u suhoj i svježoj tvari mahuna utvrđene su u trgovinama ekološkim proizvodima, dok je najveća prosječna vrijednost bakra u suhoj tvari utvrđena u mahunama uzorkovanim u trgovačkim lancima, a najveća prosječna koncentracija bakra u svježoj tvari u uzorcima sa tržnica i iz trgovina ekološkim proizvodima. Prema Uredbi o informiranju potrošača o hrani može se zaključiti da se konzumacijom 100 g ispitivanog graha mahunara podmiruje 4,21- 8,0 % dnevnih potreba čovjeka za željezom, 2,5- 3,8 % dnevnih potreba za cinkom, 4,0-13,0 % dnevnih potreba za manganom i 7,0-8,0 % dnevnih potreba za bakrom. |
| Abstract (english) | French bean (Phaseolus vulgaris L.) is an annual plant species from the legume family (Fabaceae). French bean's fruit are pods that have exceptional nutritional value and are rich in proteins, carbohydrates, fibers, vitamins and minerals. The aim of this work was to determine how the method of cultivation affects the content of microelements and the nutritional value of the pods based on the presence of microelements in the pods. Pods samples were collected in the city of Zagreb at three markets, three retail chains and three shops with organic products. After drying and homogenization, the samples were decomposed by the action of concentrated HNO3 and HClO4 in a microwave oven, and the concentrations of iron, zinc, manganese and copper were determined with an atomic absorption spectrometer. The value of dry matter in pods ranged between 6,74 and 12,54 %. The proportion of microelements in the dry matter of pods (mg/kg ST) was Fe 49,86-188,9, Zn 23,43-43,47, Mn 2,53-42,3, Cu 6,57-9,74, and in fresh matter (mg/100 g of fresh matter) Fe 0,49-1,96, Zn 0,19-0,42, Mn 0,03-0,32 and Cu 0,05-0,11. According to the Regulation on the provision of food information to consumers, it can be concluded that the consumption of 100 g of the studied french beans satisfies 4,21-8,0 % of the daily human needs for iron, 2,5-3,8 % of the daily needs for zinc, 4,0-13,0 % of the daily needs for manganese and 7,0 -8,0 % of daily copper needs. |
