Determination of trace metals in waters by FAAS after enrichment as metal-HMDTC complexes using solid phase extraction

A method has been described for the determination of Cu(II), Pb(II), Ni(II), Cd(II), Mn(II) and Fe(III) by flame atomic absorption spectrometry (FAAS) after preconcentration on Amberlite XAD-16 resin, using hexamethyleneammonium-hexamethylenedithiocarbamate (HMA-HMDTC) as a chelating agent, and NH3/NH4Cl buffer solution (pH 9). Influences of various analytical parameters such as pH, concentration of nitric acid, amount of analytes, diverse ions and sample volume were investigated. The relative standard deviation (RSD) and the detection limit (LOD) were found in the range of 0.8-2.9% and 0.006-0.277 mug/mL, respectively. Recoveries obtained by the column method were quantitative (>95%) at optimum conditions. The method was applied to the determination of some metal ions in seawater and wastewater samples. A high preconcentration factor (about 150 for seawater and 75 for wastewater samples) and simplicity are the main advantages of this suggested method

Bioavailability of soil-extractable metals to tea plant by BCR sequential extraction procedure

This study principally describes the distribution of the heavy metals such as Cu, Pb, Cd, Co, Cr, Fe, Mn, Ni, and Zn in different soil fractions and different parts of tea plant, and plant availability with single correlation. For this purpose, soil and corresponding plant samples were collected from the three tea gardens in Rize, Turkey. Tea plant (Camellia sinensis), which were segmented into leaf, stem, and root, and also treated black tea samples, were dissolved with both wet and dry ashing procedures. The BCR sequential extraction method was used for extracting the metals bound to target phases in soil samples. The method was performed to extract the metals present in exchangeable and acid soluble (i.e., bound to carbonates), reducible (bound to Fe/Mn oxides), and oxidisable forms (bound to organic matter and sulphides) in the soil samples. The determination of heavy metals in tea and soil samples was performed by FAAS. The results obtained from the sample analysis were compared with their typical soil and plant contents. For determining accuracy of the methods used, recovery studies were done and the results were found to be satisfactory (between 76% and 102%). In order to understand the uptake of metal from soil to tea plant, correlation analysis was performed between the different physicochemical forms of soil metals and their concentrations in tea plant tissues. Correlation analysis results indicated that pseudototal content of the heavy metals in soils and their sum extracted with the sequential extraction procedure were poor indicators for heavy metal uptake by plants. For Cd and Mn elements, significant positive correlations (r = 0.923-0.996) were found between the metal contents in fraction I of the sequential extraction procedure for soils and their concentrations in roots, stems, and leaves of the tea plant

Evaluation of the results of metal analyses for lake sediment samples: a multivariate statistical approach

The 28 sediment samples were collected from the lakes of a water-laden area of Sultansaziigi, Kayseri (Turkey). The metal contents such as chromium, manganese, iron, cobalt, nickel, copper, zinc, cadmium (below the detection limit), and lead in the sediment sample fractions were examined by using fractionation procedure, for example, the Community Bureau of Reference (BCR) method including sequential extraction. The determination of extractable heavy metals mentioned above in the sediment samples was carried out by name atomic absorption spectrometry (FAAS) using an injection method. In order to evaluate the analytical data by multivariate statistical techniques, principal components analysis (PCA), cluster analysis (CA), correlation analysis, and enrichment factors (EFc) were used. In order to determine the possible sources of metals, the results obtained with the multivariate techniques which use the data base containing the total elemental concentrations identified the four distinct heavy metal sources, namely soil-industrial, industrial-traffic, soil-combustion, and agricultural

Determination of trace metals in waters by FAAS after enrichment as metal-HMDTC complexes using solid phase extraction

A method has been described for the determination of Cu(II), Pb(II), Ni(II), Cd(II), Mn(II) and Fe(III) by flame atomic absorption spectrometry (FAAS) after preconcentration on Amberlite XAD-16 resin, using hexamethyleneammonium-hexamethylenedithiocarbamate (HMA-HMDTC) as a chelating agent, and NH3/NH4Cl buffer solution (pH 9). Influences of various analytical parameters such as pH, concentration of nitric acid, amount of analytes, diverse ions and sample volume were investigated. The relative standard deviation (RSD) and the detection limit (LOD) were found in the range of 0.8-2.9% and 0.006-0.277 mug/mL, respectively. Recoveries obtained by the column method were quantitative (>95%) at optimum conditions. The method was applied to the determination of some metal ions in seawater and wastewater samples. A high preconcentration factor (about 150 for seawater and 75 for wastewater samples) and simplicity are the main advantages of this suggested method.A method has been described for the determination of Cu(II), Pb(II), Ni(II), Cd(II), Mn(II) and Fe(III) by flame atomic absorption spectrometry (FAAS) after preconcentration on Amberlite XAD-16 resin, using hexamethyleneammonium-hexamethylenedithiocarba-mate (HMA-HMDTC) as a chelating agent, and NH3/NH4Cl buffer solution (pH 9). Influences of various analytical parameters such as pH, concentration of nitric acid, amount of analytes, diverse ions and sample volume were investigated. The relative standard deviation&nbsp;(RSD) and the detection limit (LOD) were found in the range of 0.8-2.9% and 0.006-0.277 &micro;g/mL,&nbsp;respectively. Recoveries obtained by the column method were quantitative ( &gt;95%) at optimum conditions.&nbsp;The method was applied to the determination of some metal ions in seawater and wastewater samples. A highpreconcentration factor (about 150 for seawater and 75 for wastewater samples) and simplicity are the main&nbsp;advantages of this suggested method.</p