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- W2075173873 abstract "A useful method for the determination of silver in soil, sediment, and rock samples in geochemical exploration has been developed. The sample is digested with concentrated nitric acid, and the silver extracted with triisooctyl thiophosphate (TOTP) in methyl isobutyl ketone (MIBK) after dilution of the acid digest to approximately 6 M. The extraction of silver into the organic extractant is quantitative and not affected by the nitric acid concentration from 4 M to 8 M, or by different volumes of TOTP-MIBK. The extracted silver is stable and remains in the organic phase up to several days. The silver concentration is determined by atomic absorption spectrophotometry. On propose une méthode pour le dosage de l'argent dans des sols, sédiments et roches, lors d'explorations géochimiques. L'échantillon à analyser est traité par l'acide nitrique concentré; l'argent est extrait avec le triisooctylthiophosphate dans la méthylisobutylcétone, après dilution (acide 4 à 8 M). La teneur en argent dans la phase organique est déterminée par spectrophotométrie par absorption atomique. Es wurde eine Methode für die Bestimmung von Silber in Boden-, Sedimentund Gesteinsproben entwickelt. Die Probe wird mit konz. Salpetersäure behandelt und das Silber nach Verdünnung der Lösung auf einen Säuregehalt von etwa 6 M mit Triisooctylthiophosphat (TOTP) in Methylisobutylketon (MIBK) extrahiert. Die Extraktion des Silbers ist quantitativ und wird durch die Salpetersäurekonzentration im Bereich 4 M bis 8 M sowie durch unterschiedliche TOTP-MIBK-Volumina nicht beeinflusst. Das extrahierte Silber ist beständig und verbleibt in der organischen Phase bis zu einigen Tagen. Die Silberkonzentration wird durch Atomabsorptions-spektrophotometrie bestimmt." @default.
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- W2075173873 date "1971-03-01" @default.
- W2075173873 modified "2023-09-25" @default.
- W2075173873 title "Determination of silver in soils, sediments, and rocks by organic-chelate extraction and atomic absorption spectrophotometry" @default.
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- W2075173873 doi "https://doi.org/10.1016/s0003-2670(01)81856-0" @default.
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