Determinación de algunos metales inorgánicos en aceites vegetales comestibles mediante espectroscopia de emisión atómicacon fuente de plasma acoplado inductivamente (ICP-AES)

Seventeen edible vegetable oils were analyzed spectrometrically for their metal (Cu, Fe, Mn, Co, Cr, Pb, Cd, Ni, and Zn) contents. Toxic metals in edible vegetable oils were determined by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES). The highest metal concentrations were measured as 0.0850, 0.0352, 0.0220, 0.0040, 0.0010, 0.0074, 0.0045, 0.0254 and 0.2870 mg/kg for copper in almond oil, for iron in corn oil-(c), for manganese in soybean oil, for cobalt in sunflower oil-(b) and almond oil, for chromium in almond oil, for lead in virgin olive oil, for cadmium in sunflower oil-(e), for nickel almond oil and for zinc in almond oil respectively. The method for determining toxic metals in edible vegetable oils by using ICP-AES is discussed. The metals were extracted from low quantities of oil (2-3 g) with a 10% nitric acid solution. The extracted metal in acid solution can be injected into the ICPAES. The proposed method is simple and allows the metals to be determined in edible vegetable oils with a precision estimated below 10% relative standard deviation (RSD) for Cu, 5% for Fe, 15% for Mn, 8% for Co, 10% for Cr, 20% for Pb, 5% for Cd, 16% for Ni and 11% for Zn.En este estudio se analizó espectrométricamente el contenido en metales (Cu, Fe, Mn, Co, Cr, Pb, Cd, Ni, and Zn) de 17 aceites vegetales comestibles mediante ICP-AES. Las concentaciones más elevadas se encontraron para el cobre en el aceite de almendra (0.0850 mg/kg), para el hierro en el aceite de maiz(c),(0.0352 mg/kg), para el manganeso en el aceite de soja (0.0220 mg/kg), para el cobalto en el aceite de girasol (b) (0.0040 mg/kg), para el cromo en el aceite de almendra (0.0010 mg/kg), para el plomo en el aceite de oliva virgen (0.0074 mg/kg), para el cadmio en el aceite de girasol (e) (0.0045 mg/kg), para el niquel en el aceite de almendra (0.0254 mg/kg) y para el zincen el aceite de almendra (0.2870 mg/kg). Los metales se extrajeron a partir de bajas cantidades de aceite (2-3 g), con una solución de ácido nítrico al 10%. Se discute el método y se conclluye que el método propuesto es simple y permite la determinación en aceites vegetales comestibles con una precisión estimada inferior al 10% para Cu, 5% para Fe, 15% para Mn. 8% para Co, 20% para Pb, 5% para Cd, 16% para Ni y 11% para Zn

Controlled release of vitamin U from microencapsulated brassica oleracea l. var. capitata extract for peptic ulcer treatment

Cabbage plant (Brassica oleracea L. var. capitata) contains compounds such as polyphenols, minerals, and ascorbic acid, as well as some amino acids such as glutamine, which has anti-inflammatory properties. In addition, its nutrient contains the component of vitamin U (S-methylmethionine) which is effective in the treatment and prevention of peptic ulcer disease. The aim of this study is to perform microencapsulation of Brassica oleracea L. var. capitata extract for controlled release of vitamin U for peptic ulcer treatment. Within this scope, vitamin U and some amino acids (L-methionine, L-glutamine, L-histidine, L-lysine, L-aspartic acid) were extracted from a cabbage by extraction methods and microencapsulated. The gelatin/gum Arabic and gelatin/sodium alginate polymer complexes were used as wall materials. Morphological analysis of the microcapsules showed that the microcapsules had a homogeneous, spherical shell structure. The results of HPLC analysis confirmed that vitamin U and amino acid compounds in cabbage extract are also present in the structure of microcapsules. FTIR analysis confirmed the interaction between shell materials and microcapsules, and the similarities in the bands of the plant extract and microcapsules indicated microencapsulation of the plant extract successfully. In vitro release testing of the microcapsules was studied in simulated gastric fluid (pH 1.2) and simulated intestinal fluid (pH 7.4) for 48 h. The maximum encapsulation efficiency and release were obtained as 86.92% and 93.6% for the gum Arabic-contained microcapsule, respectively.RP/CPS/2022/001, RP/CPS/2022/005; Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT; Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTAK; Süleyman Demirel Üniversitesi, SDÜ: FDK-2019-7330; Milli Eğitim Bakanliği, MEBMinistry of Education, Youth and Sports of the Czech Republic - DKRVO [RP/CPS/2022/001, RP/CPS/2022/005]; TUBITAK 2214-A International Research Fellowship Programme; Suleyman Demirel University Scientific Research Projects Coordination Unit [FDK-2019-7330]; Ministry of Educatio