Isolation and purification of protactinium-231

Jerome, S M; Collins, S.M.; Happel, Steffen; Ivanov, P.; Russell, Ben

doi:10.1016/j.apradiso.2017.07.051

Cited by 17 publications

(10 citation statements)

References 4 publications

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“…This effect is reduced during the course of Pa elution. As shown in Jerome et al (2017), the capability of TK400 separating Th from Pa should be quite effective by rinsing with high molarity (>9M) HCl. Indeed, our TK400 (100–150 μm) tests yielded 232 Th/ 231 Pa ratios always below 200 for the collected 10 mL of the Pa fraction eluted with 1 M HCl.…”

Section: Resultsmentioning

confidence: 95%

“…In a first experiment two subsequent applied Dowex AG1X8 columns following a method slightly modified from published procedures ,, have been compared to a method using one single TK400 column applying a slightly modified procedure suggested by Jerome et al (2017) and Knight et al (2016) . Finally, a combination using one Dowex AG1X8 column followed by one column of TK400 applying the above-mentioned methods has been tested.…”

Section: Methodsmentioning

confidence: 99%

“…For the test using TK400 a modification of published protocols , has been introduced. The 2 mL TrisKem columns (AC-142-TK) have been filled with 2 mL TK400 (100–150 μm).…”

Section: Methodsmentioning

confidence: 99%

“…Here the established Dowex AG1X8 resin is compared to the new TK400 resin (TrisKem), which comprised 1-octanol adsorbed to a semiporous resin material . The TK400 resin is expected to provide a good separation quality for Th and Pa but has not been tested with marine sediment samples yet. Here we assess the quality of the Pa separation from U and Th in marine sediments as well as the reusability of the TK400 resin as a factor for reducing costs.…”

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confidence: 99%

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Improved Separation of Pa from Th and U in Marine Sediments with TK400 Resin

Süfke

Lippold

Happel³

2018

Anal. Chem.

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Protactinium-231 is a radionuclide of broad interest in paleoceanography and paleoclimatology. This study describes an improved method for the purification and separation of Pa from marine sediment samples using the new TK400 resin by TrisKem International. The focus lies on the improvement of the separation of the abundant Th from the Pa fraction of the sample, which would reduce the peak tailing fromTh on masses 231 and 233 during ICP-MS measurement. Furthermore, the reusability of TK400 has been tested. For this purpose, the conventional method using Dowex AG1X8 for the separation and purification of Pa has been compared to methods using the TK400 resin. A combination of a Dowex AG1X8 prior to a TK400 column has shown most convincing results. Based on our results we suggest a new efficient procedural method of analyzing Pa from marine sediment samples using TK400. Chemical Pa yields for a Dowex-TK400 combination are highest compared to the Dowex only method. Furthermore, theTh/Pa ratio of the Pa-fractions has been reduced by 1 order of magnitude compared to conventional methods with Dowex AG1X8. Additionally, the reusability of TK400 resin up to nine times has been proven. The usage of TK400 is only limited in the presence of samples with a high matrix load (e.g., Fe). Therefore, matrix from sediment samples needs to be removed (here using Dowex resin) before samples are loaded onto TK400. We also report a series of concentration measurements from standard reference materials (UREM-11, NIST 2702), which have been used for Pa calibration.

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Section: Resultsmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

“…For the test using TK400 a modification of published protocols , has been introduced. The 2 mL TrisKem columns (AC-142-TK) have been filled with 2 mL TK400 (100–150 μm).…”

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Improved Separation of Pa from Th and U in Marine Sediments with TK400 Resin

Süfke

Lippold

Happel³

2018

Anal. Chem.

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“…Two methods were considered for Pa separation: TK-400 extraction chromatography resin [ 13 ] and silica gel [ 8 , 10 ]. Other options, like ion exchange chromatography or extraction chromatography with other resins were excluded, either because of the low Pa recovery or ineffective separation from Np and U [ 14 ]. The two methods were tested using natural U 3 O 8 and 231 Pa tracer and the measurements were performed by gamma spectrometry.…”

Section: Methodsmentioning

confidence: 99%

Measurement of the 231Pa/235U ratio for the age determination of uranium materials

Varga

Nicholl

Hrnecek

et al. 2018

J Radioanal Nucl Chem

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The paper describes the age (production date) determination of uranium reference materials using the 231Pa/235U ratio. Direct addition of 237Np in secular equilibrium with its 233Pa daughter was chosen instead of the regular milking of 237Np to avoid possible loss of Pa. Sample preparation consists of a fast, one-step procedure. The developed method using ICP-MS for the measurement of 231Pa is more precise than alpha spectrometry and is applicable for freshly produced low-enriched uranium materials. The measured ages are in good agreement with the reported production dates, thus the 231Pa/235U chronometer can be applied for validation of 230Th/234U in nuclear forensics and safeguards.Electronic supplementary materialThe online version of this article (10.1007/s10967-018-6247-9) contains supplementary material, which is available to authorized users.

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