Method development for plutonium analysis in environmental water samples using TEVA microextraction chromatography separation and low background liquid scintillation counter measurement

Synthesis of Silica-Based Quaternized Adsorption Material and Study on Its Adsorption Behavior for Pu(IV)

“…In the adsorption of Pu(IV), the newly synthesized silicon-based quaternized material SG-VTS-VPQ has better dynamic performance than trioctylmethylammonium chloride (TEVA) resin, which was most commonly used in the past for the adsorption and separation of Pu(IV). In the report of Liu-Bo on “extracting plutonium in water samples by TEVA and analyzing it by liquid scintillation counting method”, the static adsorption of 25 mg·L −1 plutonium in aqueous solution was carried out with TEVA resin, and the time to reach the adsorption equilibrium was about 10.3 min, much higher than the material synthesized in this study [ 47 ].…”

Analytical Methods for the Determination of 90Sr and 239,240Pu in Environmental Samples

“…The concentrations of 239 Pu and 240 Pu were 2.0 ± 0.3 Bq·kg −1 (the error is 1σ) and 0.67 ± 0.1 Bq·kg −1 , respectively. Liu et al [ 58 ] established a method to quickly determine the content of 239+240 Pu in environmental water samples by using low-background LSC, and the detection limit of 5 L water samples was 6 × 10 −3 Bq·L −1 within a 60-min counting time. Dagmara et al [ 75 ] studied the distribution of Pu in the organs and tissues of seabirds and found that the highest Pu concentration was in the digestive organs and feathers, while the smallest was in the skin and muscles.…”

“…A variety of extraction resins have been developed at home and abroad, such as TEVA, UTEVA, etc., with large loading capacity and good mass transfer performance, and they are widely used in the sample separation process. TEVA resin [ 57 ] is a quaternary ammonium salt, and the stationary phase is trialkylmethylammonium chloride, with a structural formula of CH 3 N(C n H 2n+1 ) 3 Cl (n = 8–10), generally used for the separation of Np and Pu, with the best adsorption system of 2~3 mol·L −1 nitric acid [ 58 ]. Using TEVA resin to pre-concentrate Pu in a vacuum box, the decontamination factor (DF) for uranium could reach over 1 × 10 4 , and the DF for thorium and americium was more than 1 × 10 3 [ 59 ].…”

Optimisation of plutonium separations using TEVA cartridges and ICP-MS/MS analysis for applicability to large-scale studies in tropical soils

“…7 The Pu isotopes can be separated from the interfering isotopes in the matrix and pre-concentrated to assure maximum sensitivity, using techniques such as coprecipitation, ion exchange chromatography, and extraction chromatography. [16][17][18][19] Utilising the selective TEVA column resin (Eichrom Technologies) to effectively remove U and preconcentrate Pu is common for determination by ICP-MS. 16,20 Nygren et al (2003) 19 reported that TEVA resin exhibited the maximum separation yield of Pu from soils and sediments compared to other methods. This nding is corroborated by the scientic literature and can be attributed to both the relatively low U content of the resin and the large variation in acid dependency of k ′ which is greater than 3 orders of magnitude between U and Pu with nitric acid concentration between 2 and 4 M. 21 Therefore, this paper concentrates on improving the analysis of ultra-trace Pu isotopes in east African soils by further optimising the chemistry of TEVA columns for the latest generations of mass spectrometric instrumentation, applicable to analysis of large-scale studies in tropical soils.…”