Determination of mercury species in natural waters at picogram level with on-line RP C18 preconcentration and HPLC-UV-PCO-CVAAS

• Verfasst von: Falter, Ralf [VerfasserIn]
• Verfasst von: Schöler, Heinz Friedrich [VerfasserIn]
• Titel: Determination of mercury species in natural waters at picogram level with on-line RP C18 preconcentration and HPLC-UV-PCO-CVAAS
• Verf.angabe: R. Falter, H.F. Schöler
• Jahr: 1995
• Umfang: 5 S.
• Fussnoten: Gesehen am 24.01.2023
• Titel Quelle: Enthalten in: Fresenius' journal of analytical chemistry
• Ort Quelle: Berlin : Springer, 1990
• Jahr Quelle: 1995
• Band/Heft Quelle: 353(1995), 1, Seite 34-38
• ISSN Quelle: 1432-1130
• DOI: doi:10.1007/BF00322887
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Diethyldithiocarbamate
• Sach-SW: Inorganic Mercury
• Sach-SW: Mercury Species
• Sach-SW: Methyl Mercury
• Sach-SW: Ultra Violet
• K10plus-PPN: 1832110567

Abstract

A new technique has been developed for the determination of methyl-, ethyl-, methoxyethyl-, ethoxyethyl-, phenyl- and inorganic mercury in natural water samples. The mercury compounds have been complexed for the preconcentration on RP C18 columns by sodium pyrrolidinedithiocarbamate (SPDC), sodium diethyldithiocarbamate (SDDC) and hexamethyleneammonium (HMA) — hexamethylenedithiocarbamate (HMDC), separated by HPLC and determined by UV-PCO-CVAAS (ultra violet, post column oxidation, cold vapour atomic absorption spectrometry). The standard deviations are in the range of 6.9 to 11.8%. The recoveries amount to 86%, 78%, 88%, 83%, 79% and 84% for methyl-, ethyl-, methoxyethyl-, ethoxyethyl-, phenyl- and inorganic mercury for the enrichment from 300 ml water samples. The detection limit for methyl mercury is 0.5 ppt. This new on-line preconcentration procedure has been tested with rain, drinking, surface and process water samples.