Raney nickel catalyst alone removes sulfur in reasonable yield from organic sulfur compounds, such as thiols, thioethers, disulfides, hemithioacetals, hemithioketals, diketals, thioamides, thiolesters, thiophenes, thioazoles, sulfoxides, sulfones, isothiocyanates, thioureas, and also organoselenium and tellurium compounds. This desulfurization reaction, therefore, has been used for the solution...

The accurate and precise determination of gold and other precious metals (PMs) is a vital task for companies involved in PM production and the contract or service laboratories that support them. This might involve the processing of hundreds of samples typical of exploration and mining activities, or supplying the quality control assay of the fi nal product from PM producers or recyclers. PMs ar...

The problems encountered in platform AAS determinations of selenium in biological fluids were recently reported by Carnrick et al. [1]. The presence of phosphates produces a spectral interference for the selenium determination at 196.0 nm, avoided by using Zeeman background correction. On the other hand, Hoenig and Van Hoeyweghen show that spectral interference of phosphates in animal tissues m...

An ion-associate phase (IAP) microextraction/ back-microextraction system was applied for the enrichment, separation, and detection of trace amounts nickel from environmental water samples. Thenoyltrifluoroacetone (HTTA) acted not only as a chelating reagent nickel, but also component extraction phase, i.e., IAP. Nickel in 40 mL sample solution pH-adjusted with phenolsulfonate (PS−) tetramethyl...

A rapid flotation method for separation and enrichment of ultra trace amounts of copper(II), cadmium(II), nickel(II) and cobalt(II) ions from water samples is established. At pH 6.5 and with sodium dodecylsulfate used as a foaming reagent, Cu2+, Cd2+, Ni2+ and Co2+ were separated simultaneously with 2-aminocyclopentene-1-dithiocarboxylic acid (ACDA) added to 1 l of aqueous solution. The propose...

This paper deals with the synthesis and characterization of macrocyclic ligand and its complex compound. Template condensation of chlorocarbons such as 1,1,2,2-tetrachloroethane with 1,3-diaminopropane in presence of nickel (II) or copper (II) yielded the corresponding metal complexes such as 3,7,10,14,15,19,20,24octaazatricyclotetracosane (OCTC). The macrocyclic ligands and their complexes hav...