Showing papers in "Microchemical Journal in 2007"

TL;DR: In this article, the authors reveal results of metal pollution on urban topsoil in relation to the metal content in leaves of two plant species and atmospheric particles and find a direct relationship was found between the content of Cu in soils with the Cu level in PM10 atmospheric particles.

TL;DR: In this article, a simple and powerful microextraction technique was used for determination of selenium in water samples using dispersive liquid-liquid micro extraction (DLLME) followed by graphite furnace atomic absorption spectrometry (GF AAS).

TL;DR: A survey of the literature covering the degradation of organic pollutants accomplished under mild reaction conditions is presented in this paper, where technologies are classified according to two main reaction pathways; oxidation and reduction.

TL;DR: In this article, SG-p-DMABD was used as an adsorbent for the solid phase extraction (SPE) Cr(III), Cu(II), Ni(II, Pb(II) and Zn(II).

TL;DR: In this paper, a study was carried out to evaluate preliminarily the BTEX, polycyclic aromatic hydrocarbons (PAHs), and metals contents in produced water samples taken from effluents of the Bonsucesso treatment plant located in the city of Carmopolis, North-east of Brazil.

TL;DR: A method for the determination of the inorganic profile in edible oils is proposed in this paper, where the quantification of selected metals in various oils (olive, pumpkin seed, sunflower, sesame seed, hazelnut, grape, soya, rice oil) was carried out using microwave assisted digestion followed by ICP-AES and GFAAS.

TL;DR: In this paper, the memory effect is obviated by the addition of Hg(II) complexants: thiourea and gold(III) chloride are both effective in preventing mercury sorption and vapor buildup.

TL;DR: In this article, the optimal conditions of Cr(III) and Cr(VI) separation were determined with graphite furnace atomic absorption spectrometry, and the detection limit (3σ) of the developed method was found to be 200 ε dm−3 for the first extraction and 50 ε Dm− 3 after using the twofold extraction.

TL;DR: In this article, an analytical procedure based on GC-MS was described to identify in textiles the most common flavonoid yellow dyes used in Europe since ancient times, extracted from weld, young fustic, dyer's broom, sawwort and the berries of some species of Rhamnus.

TL;DR: In this article, the levels of heavy metals in sediments of two harbours along the Sudanese Coast of the Red Sea were examined and reported for the first time, and the concentration of Mn, Fe, Ni, Cu, Zn and Pb in bulk samples and sub-samples were determined by atomic absorption spectrophotometry.

TL;DR: A 5-year survey of pesticide active ingredients and residues in Hungarian surface water samples was carried out within the framework of a national monitoring program as discussed by the authors, where a range of analytes were selected to cover compounds that potentially contaminate surface waters due to their solubility properties or mode of use.

TL;DR: In this paper, the authors quantify the content of elements present in textile materials by means of inductively coupled plasma-optical emission spectrometry (ICP-OES) and show that most of the detected elements were below the concentration limits given by the Oko Tex standard for materials coming into direct contact with the skin.

TL;DR: In this paper, a curcumin-bonded silica gel was used for separation, pre-concentration and determination of trace metal ions in biological and natural water samples by inductively coupled plasma optical emission spectrometry.

TL;DR: In this article, an ultra-low level scintillation counter equipped with an alpha-beta discrimination device was used to measure gross alpha and beta activity, 222 Rn, 226 Ra, and uranium isotopes concentrations in a relatively short time.

TL;DR: In this paper, the anodic peak current is linear to quercetin concentration in the ranges of 2.0 -1.928 c (μM, r ǫ = 0.0017−+0.999) and i p (μA) = −0.183−+−0.0731c (μm, rǫ= 0.995), respectively.

TL;DR: An optimized model of multivariate classification for the monitoring of eighteen spring waters in the land of Serra St Bruno, Calabria, Italy, has been developed as discussed by the authors, which proved to be able to notice deviations of the global analytical characteristics, by pointing out in the course of time a different distribution of the samples within the classes.

TL;DR: In this article, a solid phase extraction method for trace metals such as Cd2+, Cr6+, Cu2+, Fe3+, Mn2+, Ni2+, Pb2+ and Zn2+ using nanometer-sized alumina coated with chromotropic acid prior to determination by inductively coupled plasma atomic emission spectrometry was developed.

TL;DR: A molecularly imprinted polymer has been synthesized for a selective on-line catechol extraction, followed by its spectrophotometric determination in guarana powder, mate tea and tap water samples as mentioned in this paper.

TL;DR: In this article, a laboratory-constructed hydroponic system was employed to characterize phytofiltration for the uptake of arsenic and macronutrients by two arsenic hyperaccumulators, Pteris cretica cv Mayii (Moonlight fern) and pteris vittata (Chinese brake fern).

TL;DR: In this paper, a cloud point extraction method was proposed for the determination of cadmium and lead in drinking water using sequential multi-element flame atomic absorption spectrometry (FAAS).

TL;DR: In this article, two different types of archaeological waterlogged wood were characterized using several analytical techniques, including PY/GC/MS with in situ derivatisation with hexamethyldisilazane, GC/MS of the extractives, 1H, 13C and 31P NMR analysis, and GPC.

TL;DR: In this article, the development of effective preconcentration techniques and highly sensitive detection methods for accurate measurements of Tl species at extremely low concentration in aqueous solutions is discussed.

TL;DR: In this paper, a sequential sample preparation method was employed using a co-precipitation step for pre-concentration and a separation step applying extraction chromatographic resins.

TL;DR: In this article, the capability and limitations of total reflection X-ray fluorescence (TXRF) and inductively coupled plasma atomic emission (ICP-AES) spectrometry for the determination of iodine are discussed, in the case of commercially available dietary supplements and differently processed seaweed (kelp) products.

TL;DR: In this article, the relative roles of metal oxides and organic substance in adsorption of Pb, Cd, Cu and Co onto surface coatings were investigated, and the results indicated that metal oxide were very important sorbents for all of metal ions involved in this study, especially for Pb and Co.

TL;DR: In this paper, a slurry sampling method for the simultaneous determination of hydride forming (As, Bi, Ge, Sb, Se, Sn) and Hg and non-hydride forming (Ca, Fe, Mg, Mn, Zn) elements, without total sample digestion has been developed using the commercial dualmode sample introduction system (MSIS) coupled with microwave induced plasma optical emission spectrometry (MIP-OES) from biological and environmental reference materials and real samples.

TL;DR: A new modified nanometer SiO 2 using 5-sulfosalicylic acid (SSA) as a solid phase extractant was used for separation, preconcentration and determination of Fe(III) in aqueous solutions by inductively coupled plasma atomic emission spectrometry (ICP-AES) as discussed by the authors.

TL;DR: The metal content (Ca, Mg, Sr, Ba, K, Na, P, Fe, Al, Mn, Cu and Zn) of several ‘fino’ wines belonging to two Andalusian Denomination of Origin (DO) was determined by ICP-OES.

TL;DR: In this paper, a monitoring of radioactivity content was performed in tap waters collected in a region of Central Italy to check the compliance with recent European and Italian regulations, and the results revealed that the tritium concentration was always lower than 6.75 Bq l− 1.

TL;DR: In this article, particle-bound and gas-phase polycyclic aromatic hydrocarbons (PAHs) were measured in samples collected from July to December of 2003, in Campo Grande, MS (Brazil), on three different sites: Ary Coelho Square (AC), Indigenous Nations' Park (NI) and Indubrasil (IB).