Showing papers on "Organomercury Compounds published in 2010"

In situ ethylation of organolead, organotin and organomercury species by bromomagnesium tetraethylborate prior to GC-ICP-MS analysis.

Abstract: An analytical method for simultaneous in situ ethylation, of organolead, organotin and organomercury compounds in aqueous samples was developed using a new derivatisation agent, bromomagnesium tetraethylborate (BrMgEt4B). The determination of lead, tin and mercury compounds was done by species-specific isotope dilution, derivatisation and GC-inductively coupled plasma MS (GC-ICP-MS) or by GC-MS. The recovery and accuracy of the derivatisation were evaluated. The effect of pH and the relative quantity of derivatisation agent were studied.

Electrode reactions and electroanalysis of organomercury compounds

Abstract: Characteristic features of mechanisms and kinetics of electrode reactions of organomercury compounds (symmetrical, non-symmetrical) and organomercury salts on a mercury electrode are analyzed. Attention is focused on the effect of coordination, adsorption and the nature and properties of intermediates on these processes as well as on the formation of organomercury derivatives in the adsorption of organic and hetero-organic compounds on a mercury electrode. The kinetics of heterogeneous chemical equilibrium organic calomel?symmetrical organomercury compound in the adsorption layer and the relative stability of intermediates in the one-electron reduction of organomercury salts are discussed as well as the electrolytic hydrogen evolution catalyzed by organomercury intermediates. The problems of combined and separate electrochemical quantitation of organic and inorganic mercury compounds in natural objects are considered.

Electrode Reactions and Electroanalysis of Organomercury Compounds

Abstract: Characteristic features of mechanisms and kinetics of electrode reactions of organomercury compounds (symmetrical, non-symmetrical) and organomercury salts on a mercury electrode are analyzed. Attention is focused on the effect of coordination, adsorption and the nature and properties of intermediates on these processes as well as on the formation of organomercury derivatives in the adsorption of organic and hetero-organic compounds on a mercury electrode. The kinetics of heterogeneous chemical equilibrium organic calomel?symmetrical organomercury compound in the adsorption layer and the relative stability of intermediates in the one-electron reduction of organomercury salts are discussed as well as the electrolytic hydrogen evolution catalyzed by organomercury intermediates. The problems of combined and separate electrochemical quantitation of organic and inorganic mercury compounds in natural objects are considered.

Study of microbial Activity of Some Arylorganomercury ( II ) Derivatives Containing Amino Group on Some Pathogenic Isolated Bacteria

Abstract: The aim of this study was to evaluate a microbial activity of the three organomercury compounds : 2- amino-5-methylphenyl mercury(II)chloride 1 , 2-amino-5-bromophenyl mercury(II)chloride 2 and 2-amino-5- nitrophenyl mercury(II)chloride 3 which were synthesized and characterized by various physical techniques . It have been reported to have antimicrobial activity against six various bacteria such as Gram positive bacteria ( Staphylococcus aureus and Bacillus subtilis ) and Gram negative bacteria ( Escherichia coli , Klebsiella spp. , Salmonella spp. and Pseudomonas spp. ) . The concentrations of above compounds 1 , 2 and 3 were ( 0.5 , 0.3 - 0.5 and 0.3 - 0.5 milligram / milliliter ) found to be more effective concentrations than others related with the inhibition zone respectively . The order of antimicrobial activity for the studied compounds were depending on the power of the drawing group with mercury moiety and amino group abreast in the aromatic skeleton - structure . So , the order is NO 2 ( 3 ) > Br ( 2 ) > CH 3 ( 1 )