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Molybdenum was separated and preconcentrated as molybdate on microcolumns of octadecyl silica sorbents and silica-based strongly basic anion exchanger prior to its determination by ICP-AES. With octadecyl silica Separon SGX C18 and Separon SGX RPS, the retention of 0.010.4gmL1 Mo from 501000mL sample solutions was quantitative in the presence of the cationic surfactants carbethoxypentadecyltrimethylammonium...
Abstract.Solid phase extraction of mixtures of phenol 3 monochlorophenols, 4 dichlorophenols, 3 methyl-4-chlorophenol, 4 trichlorophenols, 2 tetrachlorophenols and pentachlorophenol was studied on octadecylsilica (Separon SGX C18) and Amberlite XAD 2 in the presence of hexadecyltrimethylammonium chloride (CTMA) in alkaline medium, and their efficiency for the preconcentration of phenols was compared...
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