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    Deep Eutectic Solvent-based Extraction of As, Mn, Pb, Cr, and Ni from Spleen, Kidney, and Brain Samples
    (14 September 2022) Bağda, Esra; Altundağ, Hüseyin; Keskin, Can Serkan
    Deep eutectic solvent extraction for As, Mn, Pb, Cr, and Ni from spleen, kidney, and brain samples was investigated. The experimental parameters such as type and amount of deep eutectic solvent and sample/deep eutectic solvent ratio were optimized. The method optimization was conducted with the certified reference material (BCR 185-R). The analytical characteristics such as limits of detection and quantitation, relative standard deviation, and calibration equations were determined. Different deep eutectic solvent types were prepared and examined for better extraction. Choline chloride was used as a quaternary ammonium salt, and oxalic acid, urea, thiourea, and citric acid were used as hydrogen bond donors. Better results and recoveries higher than 90% were obtained with oxalic acid. The calculated LOD values for As, Mn, Pb, Cr, and Ni were 1.1, 0.3, 1.3, 1.4, 0.8, and LOQ values were 3.8, 1.1, 4.3, 4.7, 2.7 mg/kg, respectively.
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    EXTRACTION AND DETERMINATION OF Cd, Co, Se, V AND Ag LEVELS IN COW’S MUSCLE, LIVER, KIDNEY, LUNG, SPLEEN AND BRAIN SAMPLES
    (2022/4/1) Bağda, Esra; Altundağ, Hüseyin; Keskin, Can Serkan
    A deep eutectic solvent (DES) consisting of oxalic acid and choline chloride was prepared and used to extract Cd, Co, Se, V, and Ag from meats. The metal levels were determined in muscle, liver, kidney, lung, spleen, and brain samples using ICP-OES. The total youden blank method was employed to eliminate the matrix effect. The order of Cd concentration in the cow's organs was spleen> brain>lung>liver>kidney>muscle. The higher and lowest concentration of Co was determined in the lung and muscle samples. Se was found in all kinds of examined cow's parts and the higher concentration was determined in the liver samples. V was not determined in the muscle and spleen samples and the abundance order in the cow's part was lung>liver>brain>kidney. Ag was determined in only one of the kidney samples.