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- W2019676987 abstract "Abstract Coastal sedimental elements were desorbed with ultrapure water, artificial seawater, 0.2M (NH4)2C2O4, 1M CH3COONH4, 0.01M EDTA·2Na, 1N HC1 and 6N HC1, independently. 56 μ1 of extracted fluid was dropped on Kimfoil to make a target. Beam bombardment was done by a cyclotron using a 4.5 MeV proton energy. For a typical sample, the maximum Fe seen in the samples was obtained by extraction with 6N HC1 (7.6 mg/g). In comparison, the Fe observed after extraction with ultrapure water, artificial seawater, and 1M ammonium acetate were essentially zero. However, the amounts seen with 0.01M EDTA·2Na and 0.2M ammonium oxalate were high as 18% and 9.5% of the 6N HC1 value, respectively. About the extraction with EDTA having most excellent characteristics of chelate agent, alkali earth elements, Mg2+ and Ca2+ were detected in almost all samples because they form ionic bonding chelates. Desorption rates of transition metal elements which form coordinate bonding cheates were observed to be proportional to the stability constant except for Mn2+ and Cu2+ anomalies." @default.
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- W2019676987 date "1993-04-01" @default.
- W2019676987 modified "2023-10-01" @default.
- W2019676987 title "PIXE analysis on desorption of elements from coastal sediments" @default.
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- W2019676987 doi "https://doi.org/10.1016/0168-583x(93)95668-u" @default.
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