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Abstract: Brassica vegetables are a source of valuable nutrients, but their content is strongly influenced by preparation method. Recently a lot of interest is paid to sous vide method, because of the specific organoleptic characteristics of the finished product. The aim of this study was to determine the influence of sous vide cooking on the content of selected macro and microminerals in Brassica vegetables. Reference methods were boiling and steaming. Additionally, the cooked vegetables were stored under refrigeration. The obtained results indicated, that the type of applied treatment had a distinct effect on the retention of analyzed nutrients in Brassica vegetables after processing. The sous vide method allowed for maximum preservation of the minerals contained in vegetables as compared to traditional methods. It was also observed, that after the storage period, in most of the analyzed cases, the level of the tested ingredients did not significantly change. Practical applications: The obtained results gave insight into retention levels of various minerals in Brassica vegetables after hydrothermal treatment by different methods: traditional cooking, steaming and sous vide method. The influence of storage period under refrigerated conditions on level of previously mentioned components was investigated. The sous vide method revealed itself as the most beneficial in terms of preservation of investigated minerals in thermally treated vegetables. It was also observed, that after the storage period, in most of the analyzed cases, the level of the tested ingredients did not significantly change. [ABSTRACT FROM AUTHOR]

The purpose of the study was to determine the effect of NaCl and KCl on the retention of some micro‐ and macroelements in hydrothermally treated broccoli, Brussels sprouts, and cauliflower. The following brines (0.0, 0.5, 1.0, 2.0, 3.0 g/100 g) were applied for boiling. The dry matter content (10.2–16.0), process yield (85.8–124.8), content of minerals: Na (241.5–72,989.3), K (24,184.4–112,831.5), Ca (1,202.5–5,339.5), Mg (981.5–2,402.1), Mn (13.6–89.8), Zn (28.4–137.8), Fe (101.8–402.3), and Cu (2.5–7.3) were determined. Minerals retention was also calculated. The type and concentration of salt were strongly correlated with the losses of mineral components during hydrothermal treatment. Vegetables prepared in NaCl solutions were able to preserve more micro‐ and macroelements as compared to KCl, and its optimum concentration was 1%. The highest reduction in microelements during thermal processing was observed for cauliflower. Practical applications: Vegetables are a good source of a many valuable nutrients, but their retention level in processed product is strongly related to the method of preparation. The most common way of preparation is to boil them in water, or saline solution applied in order to improve organoleptic properties. Usually, NaCl is used as flavor enhancer. Unfortunately, some health‐related issues arose around application of this salt, so the use of its replacers is an interesting option. This research provides detailed information about retention level of micro‐ and macroelements in Brassica vegetables prepared for consumption by traditional boiling with special emphasis paid to type and dose of applied salt. The results indicated at sodium chloride applied at 1% dose to be optimal in achieving maximum level of elements retention in boiled Brassica vegetables. [ABSTRACT FROM AUTHOR]