A method for determining the 11 phenols designated as priority pollutants by the U.S. Environmental Protection Agency at the parts-per-trillion level in water sampled from the environment is described. Drinking (2 L), ground (1.5 L), and river (0.5 L) water samples are preconcentrated by passing them through a 1 g graphitized carbon black (GCB) reversible cartridge at a flow rate of approximately 70 mL/min. After the GCB cartridge is washed with 1.5 mt methanol to eliminate water, the cartridge is reversed and then back-flushed with an acidic CH2Cl2-CH3OH mixture for eluting phenols. After partial solvent removal, the sample is subjected to reversed-phase liquid chromatography with UV detection by either a conventional or a diode-array detector. Recoveries of phenols added to 2 L of drinking water at levels between 0.05 and 4 mu g/L were higher than 90%. Compared with an octadecyl bonded silica (C-18) cartridge, the GCB cartridge had a far better extraction efficiency for the more highly water-soluble phenols. The extent to which the presence of fulvic acids in water affected the recovery of the phenols considered was investigated.

DETERMINATION OF PHENOL POLLUTANTS IN WATER AT TRACE LEVELS - EXTRACTION BY A REVERSIBLE GRAPHITIZED CARBON-BLACK CARTRIDGE / DI CORCIA, Antonio; S., Marchese; Samperi, Roberto; G., Cecchini; L., Cirilli. - In: JOURNAL OF AOAC INTERNATIONAL. - ISSN 1060-3271. - STAMPA. - 77:2(1994), pp. 446-453.

DETERMINATION OF PHENOL POLLUTANTS IN WATER AT TRACE LEVELS - EXTRACTION BY A REVERSIBLE GRAPHITIZED CARBON-BLACK CARTRIDGE

DI CORCIA, Antonio;SAMPERI, Roberto;
1994

Abstract

A method for determining the 11 phenols designated as priority pollutants by the U.S. Environmental Protection Agency at the parts-per-trillion level in water sampled from the environment is described. Drinking (2 L), ground (1.5 L), and river (0.5 L) water samples are preconcentrated by passing them through a 1 g graphitized carbon black (GCB) reversible cartridge at a flow rate of approximately 70 mL/min. After the GCB cartridge is washed with 1.5 mt methanol to eliminate water, the cartridge is reversed and then back-flushed with an acidic CH2Cl2-CH3OH mixture for eluting phenols. After partial solvent removal, the sample is subjected to reversed-phase liquid chromatography with UV detection by either a conventional or a diode-array detector. Recoveries of phenols added to 2 L of drinking water at levels between 0.05 and 4 mu g/L were higher than 90%. Compared with an octadecyl bonded silica (C-18) cartridge, the GCB cartridge had a far better extraction efficiency for the more highly water-soluble phenols. The extent to which the presence of fulvic acids in water affected the recovery of the phenols considered was investigated.
1994
01 Pubblicazione su rivista::01a Articolo in rivista
DETERMINATION OF PHENOL POLLUTANTS IN WATER AT TRACE LEVELS - EXTRACTION BY A REVERSIBLE GRAPHITIZED CARBON-BLACK CARTRIDGE / DI CORCIA, Antonio; S., Marchese; Samperi, Roberto; G., Cecchini; L., Cirilli. - In: JOURNAL OF AOAC INTERNATIONAL. - ISSN 1060-3271. - STAMPA. - 77:2(1994), pp. 446-453.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/475172
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