caa a22 4500 46911004X CHVBK 20180323133108.0 cr unu---uuuuu 170328e19920501xx s 000 0 eng 10.1007/BF02041019 doi (NATIONALLICENCE)springer-10.1007/BF02041019 Determinations of uranium at trace and subtrace levels in organic substances by wet ashing-Arsenazo III method [Elektronische Daten] [A. Al-Ammar, H. Basher] A method was developed for the determination of trace and subtrace amounts of uranium in organic substances used during the industrial process of nuclear fuel production. The method is based on decomposing 50 g of the sample by wet ashing with 25 g conc. sulfuric acid. The residue from the ashing process was ignited at 525 °C to remove all carbonaceous materials. The residue was boiled with 10 ml of 1∶1 nitric acid. The resulting solutions was analyzed for uranium concentration using a modification of the arsenazo III method which allows for uranium determination after separating it by TBP extraction from all the interfering elements. The proposed method proved to be sensitive (detection limit: 15 ppb). The relative standard deviation of the method for a sample containing 200 ppb uranium is 5%. The dynamic range of the method is wide, since the method is applicable. for trace and subtrace levels of uranium in organic substances. Akadémiai Kiadó, 1992 Al-Ammar A. Chemistry Department, Nuclear Research Center, Iraqi Atomic Energy Commission, P.O. Box 765, Baghdad, (Iraq) aut Basher H. Chemistry Department, Nuclear Research Center, Iraqi Atomic Energy Commission, P.O. Box 765, Baghdad, (Iraq) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 159/1(1992-05-01), 77-81 0236-5731 159:1<77 1992 159 10967 https://doi.org/10.1007/BF02041019 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02041019 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Al-Ammar A. Chemistry Department, Nuclear Research Center, Iraqi Atomic Energy Commission, P.O. Box 765, Baghdad, (Iraq) aut NATIONALLICENCE 700 1- Basher H. Chemistry Department, Nuclear Research Center, Iraqi Atomic Energy Commission, P.O. Box 765, Baghdad, (Iraq) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 159/1(1992-05-01), 77-81 0236-5731 159:1<77 1992 159 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer