Journal
JOURNAL OF SEPARATION SCIENCE
Volume 31, Issue 12, Pages 2182-2188Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.200700571
Keywords
LC-MS; macrolides; omeprazole; ranitidine; SPE
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This paper describes a method for determining 11 pharmaceuticals in various water sources by SPE followed by LC-(ESI) MS. SPE was carried out with Oasis (TM) HLB and the recoveries were 33 - 67% for 250 and 100 mL, sewage water, 55-77% for 500 mL, river water and 72-98% for 1 L tap water, with the exception of sulfamethoxazole and orneprazole which showed lower recoveries in all kinds of sample. The LODs in river water were of 5 ng/L for sulfadiazine, trimethoprim, sulfamethazine, sulfamethoxazole, and ranitidine and 10 ng/L for the other compounds. The highest concentrations found in river waters were for sulfamethoxazole (50 ng/L). In influent sewage waters, ranitidine was the most commonly detected compound with a maximum value of 0.24 mu g/L.
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