The easy way to use ICP-MS technique for the methyl Hg ditermination. There are some other methods available in paper, but little difficult to mainatin the recovery and run more samples.

Using Mercury analyzer might be a easy way to determination of methyl Hg.

Hi Glad,

Methylmercury can be determined by gas chromatography with good percent recovery.

Hight SC, Corcoran MT. 1987. Rapid determination of methyl mercury in fish and shellfish: method development. J Assoc Off Anal Chem. 70(1):24-30. (http://www.ncbi.nlm.nih.gov/pubmed/3558272)

MARŠÁLEK P., SVOBODOVÁ Z. 2006. Rapid determination of methylmercury in fish tissues. Czech J. Food Sci., 24: 138–142. (http://www.agriculturejournals.cz/publicFiles/50287.pdf)

However, there is another method (maybe simpler) to determine MeHg using a direct Hg analyzer (DMA80, atomic absorption spectrophotometer). G. Carbonell, J. C. Bravo, C. Fernandez, J. V. Tarazona. 2009. A New Method for Total Mercury and Methyl Mercury Analysis in Muscle of Seawater Fish. Bull Environ Contam Toxicol 83:210–213 (http://files.instrument.com.cn/FilesCenter/20090714/107595.pdf)

Good luck!

Lina.

My sincere thanks to Mr.Bedigama, Ms.Parisa and Ms Lina for your  suggestions.....Ms Lina thanks for the documents you have shared....i am going for the AA spectrometry.......need further read on the literature you have send .will communicate/seek help sometime later.thanks again.to all.