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- W2018972068 abstract "A small pre-column packed with a mercury(II)-8-hydroxyquinoline phase is used for the selective trace enrichment and clean-up of 2-mercaptobenzimidazole, a thiol model compound. Strong covalent bond formation between tha analyte and the metal-loaded sorbent allows the introduction of a wash step with methanol—water (1:1). This results in a superior selectivity to that observed with the frequently used reversed-phase packing materials.Desorption of the pre-concentrated thiol from the pre-column is effected with an eluent containing cysteine as a displacer. The elution profiles are ineffecient, however, so that peak compression of the analyte on the top of the C18 separation column is necessary. With UV obsorbance detection at 254 nm, the detection limit is 1 ppb. The excellent selectivity of the on-line pre-column sample handling is demonstrated in the analysis of river water and industrial waste water samples." @default.
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- W2018972068 title "Use of a pre-column packed with mercury(II)-8-hydroxyquinoline for the selective on-line trace enrichment of 2-mercaptobenzimidazole in liquid chromatography" @default.
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- W2018972068 doi "https://doi.org/10.1016/s0021-9673(01)90353-x" @default.
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