Within the framework of the International Atomic Energy Agency (IAEA) Analytical Quality Control Service (AQCS) Chemistry Unit a research program was initiated for the identification of trace elements such as Cd, Cu, Fe, Mn, Pb and Zn in IAEA lichen-338 for a proficiency test (PT). This was to evaluate the possibility of using lichens as biomonitors of trace elements in atmospheric pollution. P...

OBJECTIVES The objectives of this study were to determine the lead levels in blood samples from nielloware workers, to determine airborne lead levels, to describe the workers' hygiene behaviors, and to ascertain and describe any correlations between lead levels in blood samples and lead levels in airborne samples. METHODS Blood samples and airborne samples from 45 nielloware workers were coll...

Polystyrene (PS) was extracted from Styrofoam (expanded polystyrene foam) waste, so called white pollutant. The PS was functionalized with N,NBis(2-aminobenzylidene)benzene-1,2diamine (ABA) ligand through an azo spacer. The resin was characterized by FT-IR spectroscopy and elemental analysis. The PSN=N-ABA resin was used for the enrichment and speciation of Cr(III)/Cr(VI) ions and total Cr dete...

A new method for the determination of trace copper(II) in food samples by Cloud Point Extraction(CPE) combined with Flame Atomic Absorption Spectrometry(FAAS) is presented and evaluated. The method is based on the fact that hydrophobic complex of copper(II) with sodium diethyldithiocarbamate (DDTC) was formed at pH 6.0 and subsequently the hydrophobic complex was extracted into surfactant-rich ...

Flame atomic absorption spectrometry (FAAS) was adopted to detect the construction vehicles automatic transmission through simultaneous determination of typical metal elements contents (Copper, Chromium and Iron) in automatic transmission fluid (ATF). Standard curves of Copper, Chromium and Iron were portrayed. Six parallel tests were implemented and the relative standard deviations (RSD) were ...

This paper reports the preparation of a phosphorylated cotton chelator (PCC) by solid phase esterification of phosphoric acid (PA) onto defatted cotton fibres using urea as the catalyst. The synthesized PCC was employed for the preconcentration of copper from water samples prior to its determination by flame atomic absorption spectrometry (FAAS). The preconcentration of copper was studied under...

Pyrocatechol is immobilized on cellulose via NHCH(2)CH(2)NHSO(2)C(6)H(4)NN linker and the resulting macromolecular chelator characterized by IR, TGA, CPMAS (13)C NMR and elemental analyses. It has been used for enrichment of Cu(II), Zn(II), Fe(III), Ni(II), Co(II), Cd(II) and Pb(II) prior to their determination by flame atomic absorption spectrometry (FAAS). The pH ranges for quantitative sorpt...

Nowadays the major trend in IT dictates deploying applications cloud, cutting monolithic software into small, easily manageable and developable components, running them a microservice scheme. With these choices come questions: which cloud service types to choose from several available options, how distribute monolith order best resonate with selected features. We propose model that presents nov...

In this project by the use of cilicagel as Sorbent for preconcentration of traces of Cu and Zn considered by Solid Phase Extraction prior to determination by flame Atomic Absorption Spectroscopy (FAAS). In this method 4,2 Pyridilazo resorsinol (PAR) as a complexing agent For copper and zinc ion after adsorbed in cilicagel and after that eluted by 5 ml of nitric Acid (3M). Some effective Paramet...