caa a22 4500 465732178 CHVBK 20180323111744.0 cr unu---uuuuu 170327e19900801xx s 000 0 eng 10.1007/BF02035803 doi (NATIONALLICENCE)springer-10.1007/BF02035803 A precise uranium assay using solvent extraction and spectrophotometry [Elektronische Daten] [P. Mendoza Jr, D. Jackson, T. Niemczyk] The uranium spectrophotometric measurement using the uranylnitrate-quaternaryamine solvent extraction method is investigated to identify factors that affect precision and accuracy of the uranium determination. The inherent spectrophotometric precision was measured with neutral density filters in the sample light path and was found to be <0.1% relative standard deviation (RSD). Under selected experimental conditions, temperature instability has a −0.02% effect on the extraction, and a −0.4% effect on the absorbance of the uranium extract in 2-nitropropane (2-NP) or methyl isobutyl ketone (MIBK) solvents. Under optimum conditions at the 10 mg uranium level, RSDs of ∼0.1% resulted. Akadémiai Kiadó, 1990 Mendoza Jr P. Chemical and Laser Sciences Division, MS G740 Los Alamos National Laboratory, 87545, Los Alamos, NM, USA aut Jackson D. Chemical and Laser Sciences Division, MS G740 Los Alamos National Laboratory, 87545, Los Alamos, NM, USA aut Niemczyk T. Department of Chemistry, University of New Mexico, 87131, albuquerque, NM, USA aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 141/2(1990-08-01), 357-371 0236-5731 141:2<357 1990 141 10967 https://doi.org/10.1007/BF02035803 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02035803 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mendoza Jr P. Chemical and Laser Sciences Division, MS G740 Los Alamos National Laboratory, 87545, Los Alamos, NM, USA aut NATIONALLICENCE 700 1- Jackson D. Chemical and Laser Sciences Division, MS G740 Los Alamos National Laboratory, 87545, Los Alamos, NM, USA aut NATIONALLICENCE 700 1- Niemczyk T. Department of Chemistry, University of New Mexico, 87131, albuquerque, NM, USA aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 141/2(1990-08-01), 357-371 0236-5731 141:2<357 1990 141 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer