Rapid micro liquid-liquid extraction method for trace analysis of organic contaminants in drinking water. 1995

A Zapf, and R Heyer, and H J Stan
Institute of Food Chemistry, Technical University of Berlin, Germany.

The applicability and performance of a micro liquid-liquid extraction method for trace analysis of organic compounds in drinking water is reported. Tap water samples of 400 ml are saturated with sodium chloride and extracted once with 500 microliters of toluene. Extracts are analyzed directly without further treatment by gas chromatography using simultaneous electron-capture and nitrogen-phosphorus detection. Recoveries of 82 organic compounds, including organochlorine and organophosphorus insecticides, triazine and acetanilide pesticides, chlorinated anilines and phenols from tap water samples spiked at 50 to 500 ng/l were determined and relative standard deviations were calculated. For 68 compounds the recoveries were higher than 50%. The mean relative standard deviations were calculated. For 68 compounds the recoveries were higher than 50%. The mean relative standard deviations were calculated. For 68 compounds the recoveries were higher than 50%. The mean relative standard deviations at spiking levels of 50, 100 and 500 ng/l were 7.9, 6.6 and 5.2%, respectively. The extraction method proved to be rapid, simple and inexpensive. In most cases compounds were reproducibly detected well below the European Union maximum tolerance level for pesticide residues in drinking water of 100 ng/l.

UI MeSH Term Description Entries
D002849 Chromatography, Gas Fractionation of a vaporized sample as a consequence of partition between a mobile gaseous phase and a stationary phase held in a column. Two types are gas-solid chromatography, where the fixed phase is a solid, and gas-liquid, in which the stationary phase is a nonvolatile liquid supported on an inert solid matrix. Chromatography, Gas-Liquid,Gas Chromatography,Chromatographies, Gas,Chromatographies, Gas-Liquid,Chromatography, Gas Liquid,Gas Chromatographies,Gas-Liquid Chromatographies,Gas-Liquid Chromatography
D004563 Electrochemistry The study of chemical changes resulting from electrical action and electrical activity resulting from chemical changes. Electrochemistries
D014873 Water Pollutants Substances or organisms which pollute the water or bodies of water. Use for water pollutants in general or those for which there is no specific heading. Water Pollutant,Pollutant, Water,Pollutants, Water
D014881 Water Supply Means or process of supplying water (as for a community) usually including reservoirs, tunnels, and pipelines and often the watershed from which the water is ultimately drawn. (Webster, 3d ed) Supplies, Water,Supply, Water,Water Supplies
D015203 Reproducibility of Results The statistical reproducibility of measurements (often in a clinical context), including the testing of instrumentation or techniques to obtain reproducible results. The concept includes reproducibility of physiological measurements, which may be used to develop rules to assess probability or prognosis, or response to a stimulus; reproducibility of occurrence of a condition; and reproducibility of experimental results. Reliability and Validity,Reliability of Result,Reproducibility Of Result,Reproducibility of Finding,Validity of Result,Validity of Results,Face Validity,Reliability (Epidemiology),Reliability of Results,Reproducibility of Findings,Test-Retest Reliability,Validity (Epidemiology),Finding Reproducibilities,Finding Reproducibility,Of Result, Reproducibility,Of Results, Reproducibility,Reliabilities, Test-Retest,Reliability, Test-Retest,Result Reliabilities,Result Reliability,Result Validities,Result Validity,Result, Reproducibility Of,Results, Reproducibility Of,Test Retest Reliability,Validity and Reliability,Validity, Face

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