Vitamin, Trace Element, and Fatty Acid Levels of Vitex agnus-castus

The levels of fat-soluble vitamin, trace element and fatty acid of Vitex agnus-castus L., Juniperus oxycedrus L., and Papaver somniferum L. seeds in Turkey were determined by using HPLC, ICP-OES, and GC, respectively. In the Vitex agnus-castus L., Juniperus oxycedrus L., and Papaver somniferum L. seeds, linoleic acid (18 : 2) was determined with the highest level rates (%54.11, %28.03, and %72.14, resp.). In the Vitex agnus-castus L. seeds, R-tocopherol, α-tocopherol, and K1 levels were determined as 9.70 μg/g, 18.20 μg/g, and 24.79 μg/g, respectively; In the Juniperus oxycedrus L. seeds, R-tocopherol, α-tocopherol, and K1 were determined as 18.50 μg/g, 0.84 μg/g, and 5.00 μg/g, respectively, and in the Papaver somniferum L. seeds, R-tocopherol, α-tocopherol, K1, and D2 levels were determined as 43.25 μg/g, 122.05 μg/g, 12.01 μg/g, and 0.62 μg/g, respectively. In the Vitex agnus-castus L., Juniperus oxycedrus L., and Papaver somniferum L. seeds, nickel (Ni), zinc (Zn), and iron (Fe) were determined with the trace element level rates (4.42 mg/kg, 10.43 mg/kg, 3.71 mg/kg for Ni, 7.00 mg/kg, 7.70 mg/kg, and 24 mg/kg for Zn and 93.73 mg/kg, 187.95 mg/kg, and 149.64 mg/kg for Fe, resp.). These parameters in seeds are very important for human life

Separation and solid phase extraction method for the determination of cadmium in environmental samples

WOS: 000283474900003A solid phase extraction method was developed for the determination, preconcentration and separation of cadmium. The method is based on the adsorption of cadmium as 4-(2-pyridylazo) resorcinol (PAR) complex on Duolite XAD-761 resin. The extracted cadmium was determined by Flame Atomic Absorption Spectrometry (FAAS). The optimum experimental conditions for the cadmium assay were investigated. The optimum pH value for quantitative sorption of Cd-PAR was found between 3.5 and 5.5. Elution process was performed by using 5 mL of ethanol-2 mol L(-1) HNO(3) mixtures (1:3 v/v). The preconcentration factor was found as 160 for 800 mL aqueous solution containing 2.5 mu g Cd. In optimized conditions, the detection limit for cadmium was found to be 0.38 mu g L(-1). The method was applied to the determination of cadmium in different water samples. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved

REMOVAL AND PRECONCENTRATION OF CADMIUM ON POLYSTYRENE-GRAFT-ETHYLMETHACRYLATE COPOLYMER

WOS: 000340482600016The removal and determination of toxic heavy metal ions in aqueous solutions has been given much more attention over the past few years. In this paper, a removal and separation/preconcentration method for cadmium species on Poly S-15-g-EMA(100) (a kind of polystyrene-graft-ethyl methacrylate copolymer) in water samples was developed. Some experimental parameters, such as solution pH, sample flow rate, type and concentration of eluent, amount of adsorbent and effect of common matrix ions were investigated. Under the optimum conditions, adsorption isotherms and adsorption capacities have been examined. Langmuir model had been shown to fit the experimental data well, with the correlation coefficient (R-2) of 0.997. The Langmuir monolayer adsorption capacity (q(max)) and constant of the adsorption energy (K-L) were estimated as 9.7 mg/g and 0.15 L/g, respectively. The method was applied to different water samples such as wastewater, tap water and dam water

Solid Phase Extraction Method for the Determination of Cobalt in Water Samples on Duolite XAD-761 Resin Using 4-(2-Pyridylazo) Resorcinol by FAAS

WOS: 000275939600004A new solid-phase extraction method was developed for trace analysis of cobalt on Duolite XAD-761 resin by using flame atomic absorption spectrometry (FAAS). The optimum experimental conditions for the quantitative sorption of Co(II)-PAR (cobalt chelates with 4-(2-Pyridylazo) resorcinol), pH, effect of sample flow rate, concentration of eluent, sorption capacity of resin and the effect of diverse ions on the preconcentration of analytes have been investigated. The optimum pH values for quantitative sorption of Co (II)-PAR were between 5 and 7.5. Eluted process was performed by 4 mL ethanol. The sorption capacity of resin was determined to be 8.6 mg g(-1) for cobalt with a preconcentration factor of 150. In optimized conditions, the detection limit for cobalt ions was found to be 0.36 mu g L(-1). The accuracy of the proposed procedure was checked by using NIST 1573 a tomato leave as a standard reference material. The achieved results were in good agreement with certified values. The proposed method was applied for the determination of cobalt in different water samples, such as city line, geothermal, river and lake

Separation and Adsorption Properties of Poly Styrene-Graft-Ethyl Methacrylate Copolymer for Zinc, Copper, and Cobalt Ions in Water Samples

WOS: 000337668900009In this article, separation and adsorption properties of poly styrene-graft-ethyl methacrylate copolymer for zinc, copper, and cobalt ions in water samples were investigated. For this aim, some experimental and analytical parameters such as solution pH, sample flow rate, type of eluting agent, and sample solution volume were optimized. The adsorbed metal ions on polymeric resin were eluted with 5 ml of 2 mol l(-1) HNO3 and they were determined by flame atomic absorption spectrometry. In optimized conditions, the adsorption capacities for Zn, Cu, and Co were obtained as 6.8, 5.2, and 7.5 mg g(-1), respectively. The detection limits were calculated as 0.82 mu g l(-1) for Zn, 1.24 mu g l(-1) for Cu, and 0.68 mu g l(-1) for Co from standard deviation of the blank (50 ml, pH 5.8) measurements 10 replicates. The relative standard deviation of recoveries for seven replicate analyses of Zn, Cu, and Co ions (50 ml of 0.10 mg l(-1)) were found as 2.4, 2.8, and 1.5%, respectively. The accuracy of method was checked with certified reference material (NIST SRM 1643e, trace elements in water) and the developed method was successfully applied to tap water, commercial drinking water, and mineral water samples. (C) 2013 Society of Plastics Engineer

Separation and Preconcentration of Cobalt Using a New Schiff Base Derivative on Amberlite XAD-7

WOS: 000281262800010In this study, a new solid-phase extraction procedure has been developed for preconcentration and determination of Co ions in different water samples by flame atomic absorption spectrometry (FAAS). Cobalt was preconcentrated as N,N'-bis(pyridine-2-yl-methyl)benzene-1,4-diamine (Co-BPMBDA) from sample solutions using a column containing Amberlite XAD-7 and was determined. In order to achieve the best performance for the method, effects of several parameters such as pH, concentrations of ligand, sample flow rate, eluent, and matrix ions on the method efficiency were investigated. Under optimum conditions, the preconcentration factor was found to be 200 for 1000 mL waters samples. Detection limit based on the 3S(b) criterion was calculated as 0.24 mu g/L for 100 mL of sample solution and relative standard deviation was found to be 1.8%. The method was applied to determine the trace amounts of cobalt in water samples

Determination of Trace Elements in Some Dried Winter Foods

WOS: 000271301600099The levels of trace elements in nine food of winter which are grown in Elazig, Turkey were determined. Flame atomic absorption spectrometry (F-AAS) and high performance liquid chromatography (HPLC) were used in this work. The levels of trace metals in food samples were found in the ranges, 60-250, 8.60-58.60, 13.20-44.8, 0.75-3.92, 0.18-0.42 mu g g(-1) (dry matter) for Fe, Zn, Cu, Ni and Co, respectively. The accuracy and precision of the analysis were checked against the standard reference materials SRM (NIST 1573 a-tomato leaves). The results obtained for Cu, Zn, Fe, Ni and Co were in an excellent agreement with the certified values

The Effect of Lipoic Acid on Macro and Trace Metal Levels in Living Tissues Exposed to Oxidative Stress

WOS: 000266504800007PubMed ID: 19519297Environmental pollution resulting from fast-paced industrialization, various chemicals used in agriculture, additives in food, smoking and use of alcohol, radiation, some viruses and poor dietary habits all have currently increased the incidence and types of cancer. Polycyclic hydrocarbons are an example of this type of carcinogens. Living things are exposed to this free radical-increasing substance due to various reasons. Oxidative stress caused by reactive oxygen species has an important place in the etiology of cancer, which develops in relation to many factors. Injury caused by cancer in the organism may affect other organs, as well as the tumors organs and tissues. In addition, it is known that some changes take place in the content of macro and trace elements due to cancer in the organism. Our study is intended to explore the protective role of alpha-lipoic acid, which has antioxidant characteristics in living tissues exposed to oxidative stress, in the macro and trace element levels

Solid phase extraction of lithium ions from water samples using K-birnessite with layer-structure material form (KBRLSM)

WOS: 000367710900019Layer-structure materials have attracted considerable interest for the removal, separation, and preconcentration of trace metals in analytical and environmental chemistry. In the present work, we developed a separation and preconcentration method for lithium ions from water samples using K-birnessite with layer-structure material (KBRLSM) form. The experimental parameters that affected the extraction efficiency of the method such as pH, flow rate and volume of the sample solution, concentration of eluent, amount of adsorbent, effect of common matrix ions, and capacity of adsorbent were investigated and optimized. The adsorbed Li ions on KBRLSM were eluted with 5mL of 1molL(-1) HCl solutions and their concentrations were determined by high resolution-continuum source flame atomic absorption spectrometry. The adsorption isotherm studies indicate that the adsorption of Li ions follows both the Langmuir and Freundlich isotherms. The Langmuir monolayer adsorption capacities (q(max)) were estimated as 2.77mgg(-1). A constant of the energy (K-L) for Li was calculated as 0.35Lg(-1). The optimum pH value for quantitative sorption of Li ions was found between 5.0 and 7.0. The preconcentration factor was found as 40 for 200mL aqueous solution containing 5g Li ions. The developed method was successfully applied to some water samples.Ahi Evran UniversityAhi Evran University [BAP: FBA-11-01]; Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [110T111]The authors would like to express their appreciation for the support of the sponsors [Ahi Evran University BAP: FBA-11-01 and the Scientific and Technological Research Council of Turkey (TUBITAK) grant number 110T111]