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Oranges can additionally enrich the body with potassium, phosphorus, and manganese, while lime can be a source of calcium, zinc, sodium, and especially potassium. Oranges and pomelos are the fruits richest in iron and copper, so they could be recommended in cases such as hemoglobin production disorders resulting from a deficiency of these elements. The content of macro- and micronutrients in the peel of most of the fruits far exceeded their quantity in the pulp. To determine the content of minerals (Na +, K +, Ca +2, Mg +2, Fe +2, Zn +2, Cu +2, Mn +2, and Se +2), the samples were mineralized and analyzed using an Analytik Jena PlasmaQuant PQ 9000 inductively coupled plasma optical emission spectrometer. To prepare laboratory samples, each fruit was cut in half, and one half was homogenized, treating the sample as a whole (peel + flesh), while the other half was peeled and the pulp (F) and peel (P) were homogenized separately. The fruits were purchased at a supermarket at one time. The research material consisted of fresh citrus fruits belonging to the genus Citrus L in the family Rutaceae. The aim of the study was to compare the mineral content between the peel and the pulp of citrus fruits and to determine which citrus fruit, among orange ( Citrus sinensis), pomelo ( Citrus maxima), mandarin ( Citrus reticulata Blanco), lemon ( Citrus limon), key lime ( Citrus aurantifolia), and red, yellow, or green grapefruit ( Citrus paradisi), is the richest in minerals.
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