Direct isotopic analysis of solid uranium particulates on cotton swipes by microextraction-ICP-MS

Analysis of solid uranium particulates on cotton swipes with an automated microextraction-ICP-MS system

“…Regarding a comparison to a previous study utilizing microextraction-ICP-MS for uranium particulate analysis, the % RD was improved by ∼10×, while the EP did not change. 37 One possible factor in the improvement in % RD for this study was the increase in sample throughput that allowed for a much larger sampler size. Additionally, the increased sample throughput allowed for a mass bias measurement after every three sample measurements while the previous study only performed one mass bias per day, and the mass bias samples were actual particles as opposed to deposited solutions.…”

“…33 Microextraction was also proven to successfully determine uranium isotope ratios for solid particulates of uranyl nitrate and uranyl fluoride placed on the surface of a cotton swipe. 37 The external precision (EP) of these measurements ranged from 1% for the 235 U/ 238 U ratio to 10% for the 234 U/ 238 U ratio. A major constraint to increasing throughput with this method is the difficulty in positioning the microextraction probe head directly over a small particulate that is only a few μm in diameter.…”

“…The automated system was evaluated for its accuracy in sampling particular swipe locations and its ability to increase sample throughput in comparison to the manual positioning previously employed. 37 The uncertainty of the quadrupole ICP-MS isotope ratio measurements was also evaluated with larger sample sizes compared to previous work. 33,34,37…”

“…37 The uncertainty of the quadrupole ICP-MS isotope ratio measurements was also evaluated with larger sample sizes compared to previous work. 33,34,37…”

A Novel Electrochemical Sensor Modified with a Computer-Simulative Magnetic Ion-Imprinted Membrane for Identification of Uranyl Ion

“…The latter is easy to form water-soluble uranyl ion (UO 2 2+ ) compounds. Uranium in water samples has been determined using various physicochemical methods, including inductively coupled plasma mass spectrometry (ICP-MS) [3], in some cases combined with ion chromatography [4] and radiation measurement techniques [5,6], and other analytical methods such as differential pulse polarography [7], neutron activation analysis [8], gas chromatography [9,10], as well as γ and α spectrum [11]. Although these methods have high sensitivity and favorable detection limits, their application requires costly equipment and lofty operating expenses.…”