Topic
Organomercury Compounds
About: Organomercury Compounds is a research topic. Over the lifetime, 392 publications have been published within this topic receiving 6465 citations.
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TL;DR: In this article, the authors proposed a simple, inexpensive and does not require the preliminary conversion of organomercury compounds to elemental or ionic mercury, which is applied successfully to methylmercury determination in water of Kara Sea.
Abstract: The enzymatic determination of organomercury compounds (methyl-, ethyl-, phenyl-mercury) is based on their effect on the induction period (τind) caused by the introduction of sodium diethyldithiocarbamate to the oxidation of o-dianisidine, o-phenylenediamine and 3, 3′, 5, 5′-tetramethylbenzidine by H2O2 catalysed by native horseradish peroxidase. τind is inversely proportional to organomercury compounds concentration over a range of 0.05–10 μM. The lowest detection limit (Cmin) is 0.03 μM and the standard relative deviation (RSD) is lower than 3%. The proposed method is simple, inexpensive and does not require the preliminary conversion of organomercury compounds to elemental or ionic mercury. The developed procedure is applied successfully to methylmercury determination in water of Kara Sea.
6 citations
6 citations
10 Oct 1996
TL;DR: In this article, the role of natural organic substances in dissolution, transport and concentrating of mercury in environment are generalized, and the interaction of mercury (II) with fulvic acids (FA) and humic acids (HA) have been studied.
Abstract: The data about the role of natural organic substances in dissolution, transport and concentrating of mercury in environment are generalized. The interaction of mercury (II) with fulvic acids (FA) and humic acids (HA) have been studied. It has been shown that in the reaction of mercury ions with FA stable soluble high-molecular mercury (II) fulvate complexes are formed. These complexes are predominating form of mercury in surface fresh waters. The interaction of mercury (II) with FA leads to the abrupt increase of mercury mobility in waters and sails. On the contrary HA behave as complexing sorbents promoting mercury concentrating in soils and bottom sediments. Another direction of mercury (II) interaction with humus acids is the formation of organomercury compounds. Principal possibility of abiological methylation of mercury by means of interaction of mercury (II) with FA has been proved. The output of methylmercury increases with concentration of FA and pH.
5 citations
TL;DR: In this article, the photolysis of symmetric and asymmetric organomercury compounds has been studied by CIDNP and no indications of the existence of RHg· radicals have been found.
Abstract: The photolysis of symmetric and asymmetric organomercury compounds has been studied by CIDNP. No indications of the existence of RHg· radicals have been found. Depending on the solvent, reactions occur from excited states with different spin multiplicities.
5 citations
TL;DR: In the aromatic series, the decarboxylation of mercuric arenecarboxylates goes much less readily due to the introduction of a substituent into the aromatic nucleus.
Abstract: 1.
Under the action of peroxides or UV radiation mercuric alkanoates undergo initiated free-radical decarboxylation with formation of alkylmercury compounds.
2.
For the lower alkanoates — mercuric acetate and propionate — the decarboxylation reaction has a chain character and provides a convenient method for the synthesis of organomercury compounds, particularly (alkanoyloxy) methylmercurys.
3.
In the aromatic series the decarboxylation of mercuric salts goes much less readily. The introduction of a substituent into the aromatic nucleus hinders the decarboxylation of mercuric arenecarboxylates.
4.
Mercurous carboxylates react with peroxy compounds with formation of organomercury compounds. The reaction is of preparative interest and can be applied for the fixation of free radicals in the liquid phase.
5 citations