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Successful applications of different analytical procedures to determine quantitatively mercury in aqueous media can be found in recent literature. Fundamentally it has made use of Cold Vapour Atomic Absorption Spectrometry (CV-AAS), X-Ray Fluorescence or UV Spectrophotometry, Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES), or Inductively Coupled Plasma Mass Spectrometry (ICP-MS), which are the techniques commonly used for trace measurement of heavy metal in the laboratory. In this paper a new and alternative methodology to determine quantitatively mercury in aqueous media is reported. A kryptofix carbon-paste electrode has been used to determine voltammetrically mercury. The detection limit for mercury was evaluated to be 0.12 µg/l. [ABSTRACT FROM AUTHOR]

A solid Sonogel-Carbon electrode was modified for the determination of Hg (II) in industrial waste water. 3-Methylthiophene (3MT), pyrrol, poly-3-methylthiophene (P3MT), polypyrrol, and C18 were used for the chemical modification. The obtained composite electrodes were tested for their response to Hg(II); the best results were observed for the 3MT monomer modification with a detection limit of 10 -2 mg · l -1 and 3 weeks lifetime of use. A linear relationship between anodic peak height and concentration inside the range of 0.07–0.42 mg · l -1 was obtained. A study of interferences due to other heavy metal is also included. [ABSTRACT FROM AUTHOR]