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- W2024950004 abstract "A rapid and extremely sensitive method for the determination of mercury concentrations as low as 20 ng 1−l in water is described. The samples are digested with a mixture of potassium permanganate and sulphuric acid, in order to decompose organic compounds containing or adsorbing mercury and to avoid adsorption on the walls of the container as well as losses by volatilization. The recommended concentration of permanganate is shown to decompose methylmercury compounds completely. After digestion the analysis is carried out by the cold-vapour atomic absorption technique. Es wird eine schnelle und extrem empfindliche Methode für die Bestimmung von Quecksilberkonzentrationen in Wasser bis zu 20 ng 1−1 herab beschrieben. Die Proben werden mit einem Gemisch von Kaliumpermanganat und Schwefelsäure digeriert, um die organischen Verbindungen zu zersetzen, die das Quecksilber enthalten oder adsorbieren, und urn Adsorption an den Gerässwandungen sowie Verluste durch Verflüchtigung zu vermeiden. Die empfohlene Permanganatkonzentration zersetzt Methylquecksilberverbindungen vollständig. Nach der Vorbehandlung wird die Analyse nach dem flammenlosen Kaltdampf-Atomabsorptionsverfahren durchgeführt. Une méthode rapide et extrèmement sensible est décrite pour le dosage du mercure, à des concentrations de l'ordre de 20 ng 1−1. Les échantillons sont traités par un mélange de permanganate de potassium et d'acide sulfurique, afin de décomposer les composés organiques et d'éviter une adsorption sur les parois du récipient,de même que des pertes par volatilisation. La concentration de permanganate recommendée permet la décomposition totale des composés méthylmercure. L'analyse est finalement effectuée par absorption atomique sans flamme." @default.
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- W2024950004 date "1971-02-01" @default.
- W2024950004 modified "2023-09-24" @default.
- W2024950004 title "Determination of mercury in natural waters and effluents by flameless atomic absorption spectrophoto- metry" @default.
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- W2024950004 doi "https://doi.org/10.1016/s0003-2670(01)82101-2" @default.
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