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  • 1
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An analytical method has been developed which allows the determination of 22 different neutral and weakly basic drugs belonging to several different medicinal classes like antiphlogistics, betablockers, β2-sympathomimetics, lipid regulators, antiepileptic agents, psychiatric drugs and vasodilators in waste water as well as in river and drinking water. A method including solid phase extraction, derivatization by silylation and detection by GC/MS permits detection down to 5 ng/L. The recovery rates mostly exceeded 70%. However, the determination of phenazone, carbamazepine, cyclophosphamide, ifosfamide and pentoxiphylline is frequently disturbed by organic co-extractants in real samples of rivers and waste waters. Therefore, a time saving alternative method has been developed, combining solid phase extraction (as an enrichment step) together with detection by LC-electrospray/MS/MS allowing the measurement of 5 neutral drugs. Detection limits down to 10 ng/L have been achieved even for organically highly contaminated waters like sewage treatment plant effluents.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Iodinated contrast media belong to the most frequently applied compounds in medicine. They exhibit a high polarity and are very persistent against metabolism by the organism and environmental degradation. A sensitive method for the determination of five iodinated contrast media in aqueous matrices is described. Solid phase extraction utilizing Isolute ENV+ material was used for sample enrichment. The contrast media were partially separated on a RP-C18 column, and detection was achieved using electrospray-tandem MS (API III plus and API 365) allowing the sensitive quantitation of these compounds down to the lower ng/L range. The recovery rates generally exceeded 70%, for spiked surface water as well as tap water. The analytes were detected in native samples such as municipal sewage treatment plant (STP) effluent, the river Rhine and even in tap water.
    Type of Medium: Electronic Resource
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