Mercury(II ) and methylmercury cations at the sub-ppb level dithizone-anchored poly(vinylpyridine) as a chelating resin has also been described for this purpose,20,21 but the synthesis and were adsorbed quantitatively from aqueous solution onto a column packed with dithizone immobilized on sodium dodecyl preparation of this sorbent is tedious and requires three steps. Surfactant molecules are known to form self-aggregates sulfate coated alumina. The trapped mercury was then backextracted into the aqueous phase with 1 M hydrobromic acid called 'hemi-micelles' or 'ad-micelles' on solids. The hydrocarbon cores of the micelles give them the unique ability to and determined by cold vapour atomic absorption spectrometry by utilizing the reaction with sodium trap non-ionic compounds in acidic solutions. These micelles can also solubilize hydrophobic compounds which are other-tetrahydroborate. Mercury(II ) and methylmercury cations were completely recovered from water with a preconcentration wise sparsely soluble in water. For example, chromium() and chromium() in strong acidic solutions (0.24  HCl) were factor of 100. The analytical procedure was applied to the determination of mercury(II ) and methylmercury in river and separated by using a microcolumn of sodium dodecyl sulfate coated alumina.22 Under these conditions, chromium(), tap water.which is in the non-ionic state presumably in the form of Keywords: Mercury; dithizone; sodium dodecyl sulfate; cold H 2 CrO 4 or HCrO 3 Cl, is retained quantitatively on the column, vapour atomic absorption spectrometry while chromium(), which is cationic, remains unadsorbed. Surfactant-coated hydrated iron() oxide23 or alumina24 were Mercury compounds are known to be highly toxic. Sources of also used for the removal of toluene, p-xylene, trichloroethylene mercury are either man-made such as industrial wastes, pesticand pentachlorophenol from aqueous samples.

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