A Stopped-Flow Method for the Determination of Ascorbic Acid in Orange Juice Containing Triose Reductone |
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| Authors: | Hitsohi Obata Tai Tokuyama Yasunori Nitta Masanosuke Takagi Keitarou Hiromi |
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| Institution: | 1. Department of Chemistry, Faculty of Engineering, Kansai University, Suita, Osaka 564;2. Department of Agricultural Chemistry, College of Agriculture, University of Osaka Prefecture, Sakai, Osaka 591;3. Department of Food Science and Technology, Faculty of Agriculture, Kyoto University, Kyoto, 606 |
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| Abstract: | The adsorption of uranium by chitin phosphate and chitosan phosphate was investigated to obtain information on uranium recovery from aqueous systems, especially sea water and uranium mine waste water. The adsorption of uranium by chitin phosphate and chitosan phosphate was much greater than copper, cadmium, manganese, zinc, cobalt, nickel, magnesium and calcium. The adsorption of uranium was very rapid during the first 10 min and was affected by pH of the solution, temperature, granule radius and the co-existence of carbonate ion. The amounts of uranium adsorbed on the adsorbents increased linearly as the external uranium concentration increased. Uranium adsorbed on chitin phosphate easily desorbed with diluted sodium carbonate solution. On the other hand, uranyl and cobalt ions were separated from each other by using chitin phosphate. |
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