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- W1971357961 abstract "Surfactant aggregates formed on solid surfaces, such as alumina 1 , 2 or hydrated iron(III) oxide, 3 are called admicelles, whose interior tends to incorporate sparingly soluble organic constituents. Previously, we proposed a novel separation technique with admicellar sorbents for inorganic trace analysis. 4 , 5 For example, trace heavy metals in water were converted into hydrophobic chelates with ammonium pyrrolidinedithiocarbamate (APDC), and successfully incorporated in admicelles, 6 , 7 Negatively charged metal-humic complexes were also collected along with humic and fulvic substances, though admicelles consisted of alumina particles and anionic surfactants.8 The present communication describes the potential and utility of alumina and admicellar sorbents in chemical speciation, by taking the case of copper(II) in water as an example. Copper-humic complexes were separated from copper(II) ions with the alumina sorbent, whereas total dissolved copper was preconcentrated by the APDC-admicellar method. Analytical results showed that 60 - 70% of the total dissolved copper was present as negatively charged species (mainly humic complexes) in river water." @default.
- W1971357961 created "2016-06-24" @default.
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- W1971357961 date "2002-02-01" @default.
- W1971357961 modified "2023-09-23" @default.
- W1971357961 title "Alumina and Admicellar Sorbents for the Separation of Copper(II) Ions and Humic Complexes in Water" @default.
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- W1971357961 doi "https://doi.org/10.2116/analsci.18.199" @default.
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