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- W2021307941 abstract "Abstract A procedure for the determination of O,O-bis(2-ethylhexyl)phosphorodithioic acid (EPDTH) in water has been developed. It includes the extraction of the analyte as its Bi(III) complex followed by derivatization with pentafluorobenzylbromide and subsequent GC separation and electron capture detection. The formation of a Bi(III) complex of EPDTH ensures quantitative extraction and derivatization also at very low concentrations, whereas the use of a reagent leading to a halogen-containing derivative allows the application of the highly sensitive and selective ECD. The good linearity is characterized by a value of 0.9993 of the linear correlation coefficient in the 0.05-1000 ppb analyte concentration range. The mass detection limit for the pentafluorobenzylester of EPDTH is 1 pg for a signal-to-noise ratio of 3. With this method, the determination of EPDTH below the maximum admissible concentration of 100 ppt established for organophosphorous compounds in drinking water is possible. Non-contaminated groundwater samples from different areas were analysed. It was demonstrated that no matrix compounds are present that can interfere with the determination of the analyte in a concentration above 20 ppt. In a contaminated groundwater sample 50 ppt EPDTH were found." @default.
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- W2021307941 title "Determination of O,O-Bis(2-Ethylhexyl)Phosphorodithioic Acid in Water at the ppt Level by GC/ECD After Reactive Extraction and Pre-Column Derivatization" @default.
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- W2021307941 doi "https://doi.org/10.1080/03067319008030523" @default.
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