Optimization of the arsenazo-III method for the determination of uranium in water and plant samples.
This work reports a reliable, fast and optimized photometric technique based on the specific chemical complexation of uranyl ion with arsenazo-III. In the case of solid samples (plant samples), for which mineralization under acidic and oxidative conditions was used, addition of ascorbic acid led to stabilization of the arsenazo-uranyl complex over time. The results, in total agreement with data obtained from α and γ spectrometries, demonstrate that the present technique is able to precisely quantify uranium in water as well as in plant samples, within the μg/L and mg/g ranges respectively.
LCSN, EA 1069, 123 Avenue Albert Thomas, 87060 Limoges, France; Pe@rL, ESTER Technopôle, 20 rue Atlantis, 87068 Limoges cedex, France.
Loïc
L
Jauberty
Nicolas
N
Drogat
Jean-Louis
JL
Decossas
Vincent
V
Delpech
Vincent
V
Gloaguen
Vincent
V
Sol
D001150:Arsenazo III / Q000737:chemistry*; D001205:Ascorbic Acid / Q000737:chemistry; D002614:Chelating Agents / Q000737:chemistry*; D004785:Environmental Pollutants / Q000032:analysis*; D010783:Photometry / Q000379:methods*; D024301:Plant Bark / Q000737:chemistry; D028224:Pseudotsuga / Q000737:chemistry; D011868:Radioisotopes; D011874:Radiometry; D014501:Uranium / Q000032:analysis*; D062065:Wastewater / Q000737:chemistry
D001150:Arsenazo III; D001205:Ascorbic Acid; D002614:Chelating Agents; D004785:Environmental Pollutants; D011868:Radioisotopes; D014501:Uranium; D062065:Wastewater
2,7-bis(2-arsenophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonic acid disodium salt; Arsenazo; Ascorbic acid; COFRAC; Colorimetric; French accreditation committee; Plant samples; TTA; Uranium; arsenazo-III; part per billion; part per million; ppb; ppm; toluene-saturated 2-thenoyltrifluoroacetone