Methylmercurie chloride determination

Total mercury is determined in soils containing phenylmercury acetate and or ethylmercury acetate using the method described by Polley and Miller [31]. Total mercury is determined in soils containing methylmercury chloride and methylmercury dicyanamide by the method described by Kimura and Miller [32], Kimura and Miller [30] present chemical data on the nature of residual mercurials in soil and in the atmosphere surrounding the treated soil to further elucidate the phenomena of degradation in soil. 

Mizuishi, K., Takeuchi, M., Hobo, T. Direct GC determination of methylmercury chloride on HBr-methanol-treated capillary columns. Chromatographia 44, 386-392 (1997)... 

Fig. 2 Chromatogram of a standard mixture after complexa-tion with sodium diethyldithiocarbamate. Composition of the standard mercury dichloride, methylmercury chloride, ethyl-mercury chloride, methoxyethylmercury chloride, ethoxyethyl-mercury chloride, phenylmercury chloride, and tolymercury chloride. [Reprinted from A. Knochel and H. Potgeter, Interfacing supercritical fluid chromatography with atomic fluorescence spectrometry for the determination of organomercury compounds,/. Chromatogr. A 786 192 (1997). Copyright 1997, with permission from Elsevier Science.]...

Stary, J. and Prasilova, J. (1976a) Determination of phenylmercury chloride in the presence of methylmercury chloride. Radiochem. Radioanal. Letters, 26, 33-38. 

Bache and Lisk determined dmethylmercury and methylmercury-chloride in fish by emission spectrometry in a helium plasma. Dimethylmercury was chromatographed on a 2ft glass column of Chromosorb 101. Methyl mercury salts were separated on a 6ft column of 1 1 0V-17/QF-1. The separated compounds were detected by their emission spectra at the 2537A° atomic mercury line which gave a linear response for O.l-lOOyg of injected methylmercurychloride ... 

Two methods for determining methylmercury chloride in fish, egg-white, meat and liver without interference by thiols are described on the following pages. 

Kampe and McMahon used the Westoo procedure to determine methylmercury in fish. Their procedure involved the partitioning of methylmercury chloride in benzene and gas chromatographic analysis with electron capture detection. Down to 0.02ppm of methylmercury chloride can be detected in a lOg sample. 

Chiba et al. [749] used atmospheric pressure helium microwave induced plasma emission spectrometry with the cold vapour generation technique combined with gas chromatography for the determination of methylmercury chloride, ethylmercury chloride and dimethylmercury in sea water following a 500-fold preconcentration using a benzene-cysteine extraction technique. 

Kimura and Miller [29] have described a procedure for the determination of organomercury (methylmercury, ethylmercury and phenylmercury compounds) and inorganic mercury in soil. In this method the sample is digested in a steam bath with sulphuric acid (0.9M) containing hydroxy ammonium sulphate, sodium chloride and, if high concentrations of organic matter are present, potassium dichromate solution. Then, 50% hydrogen... 

S. Fragueiro, I. Lavilla, C. Bendicho, Direct coupling of solid phase microextraction and quartz tube-atomic absorption spectrometry for selective and sensitive determination of methylmercury in seafood an assessment of chloride and hydride generation, J. Anal. Atom. Spectrom., 19 (2004), 250-254. 

Protection Agency has determined that mercury chloride and methylmercury are possible human carcinogens. 

There are inadequate human cancer data available for all forms of mercury. Mercuric chloride has caused increases in several types of tumors in rats and mice, and methylmercuiy has caused kidney tumors in male mice. The HPA has determined that mercuric chloride and methylmercury are possible human carcinogens. 

Methylmercury and phenylmercury are determined down to lOpgml by Hquid-liquid extraction from 3mol aqueous HCl into benzene, and addition of K I to the separated organic phase. Inactive chloride is completely displaced by... 

Rapid determination of methylmercury salt in liver. Follow cysteine acetate procedure only adding Ig of molybdic acid/lOg of sample to the liver suspension and shake for 30 seconds. Then add the sodium chloride, hydrochloric acid and benzene at once. Shake and centrifuge immediately. When preparing the calibration curve according to this procedure, add the methylmercury salt immediately beofre the first extraction with benzene. 

Cappon and Crispin Smith have described a method for the extraction, clean-up and gas chromatographic determination of organic (alkyl- and aryl-) and inorganic mercury in biological materials. Methyl-, ethyl-, and phenylmercury are first extracted as the chloride derivatives. Inorganic mercury is then isolated as methylmercury upon reaction with tetramethyltin. The initial extracts are subjected to thiosulfate clean-up, and the organo-mercury species are isolated as the bromide derivatives. Total... 

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