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Rapid determination of (237)Np in soil samples by multi-collector inductively-coupled plasma mass spectrometry and gamma spectrometry.

Yi X, Shi Y, Xu J, He X, Zhang H, Lin J - J Radioanal Nucl Chem (2013)

Bottom Line: The neptunium in the soil is separated by thenoyl-trifluoracetone extraction from 1 M HNO3 solution after reducing Np to Np(IV) with ferrous sulfamate, and then purified with Dowex 1 × 2 anion exchange resin. (239)Np in the resulting solution is measured with gamma-spectrometry for chemical yield determination while the (237)Np is measured with MC-ICP-MS.Measurement results for soil samples are presented together with those for two reference samples.By comparing the determined value with the reference value of the (237)Np activity concentration, the feasibility of the procedure was validated.

View Article: PubMed Central - PubMed

Affiliation: Northwest Institute of Nuclear Technology, Xi'an, 710024 Shaanxi People's Republic of China.

ABSTRACT

A radiochemical procedure is developed for the determination of (237)Np in soil with multi-collector inductively-coupled plasma mass spectrometry (MC-ICP-MS) and gamma-spectrometry. (239)Np (milked from (243)Am) was used as an isotopic tracer for chemical yield determination. The neptunium in the soil is separated by thenoyl-trifluoracetone extraction from 1 M HNO3 solution after reducing Np to Np(IV) with ferrous sulfamate, and then purified with Dowex 1 × 2 anion exchange resin. (239)Np in the resulting solution is measured with gamma-spectrometry for chemical yield determination while the (237)Np is measured with MC-ICP-MS. Measurement results for soil samples are presented together with those for two reference samples. By comparing the determined value with the reference value of the (237)Np activity concentration, the feasibility of the procedure was validated.

No MeSH data available.


Related in: MedlinePlus

The neptunium-americium separation scheme 1 loading: 0.1 M HNO3; 2 rinsing: 0.1 M HNO3; 3 elution: 1 M HNO3
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Fig1: The neptunium-americium separation scheme 1 loading: 0.1 M HNO3; 2 rinsing: 0.1 M HNO3; 3 elution: 1 M HNO3

Mentions: 239Np in radioactive equilibrium with its 243Am parent was separated with HDEHP extraction chromatography resin (100–200 mesh, Beijing Research Institute of Chemical Engineering and Metallurgy, China) as shown in Fig. 1. Briefly, (1) Add 243Am spike solution of ~105 Bq to a beaker and dilute to 0.1 M HNO3 with deionized water. (2) The solution is passed through a HDEHP extraction chromatography resin column (0.75 cm i.d. × 10 cm long) which is pre-equilibrated with 15 ml 0.1 M HNO3 at a flow rate of 1 ml/min and washed with 10 ml 0.1 M HNO3 to improve the recovery of 239Np. The eluate is collected into a clean vessel. (3) The eluted 239Np in the vessel was measured by gamma-ray spectroscopy to check the yield of this isotope. (4) 243Am was later recovered by washing the column with 20 ml of 1 M HNO3.Fig. 1


Rapid determination of (237)Np in soil samples by multi-collector inductively-coupled plasma mass spectrometry and gamma spectrometry.

Yi X, Shi Y, Xu J, He X, Zhang H, Lin J - J Radioanal Nucl Chem (2013)

The neptunium-americium separation scheme 1 loading: 0.1 M HNO3; 2 rinsing: 0.1 M HNO3; 3 elution: 1 M HNO3
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4514457&req=5

Fig1: The neptunium-americium separation scheme 1 loading: 0.1 M HNO3; 2 rinsing: 0.1 M HNO3; 3 elution: 1 M HNO3
Mentions: 239Np in radioactive equilibrium with its 243Am parent was separated with HDEHP extraction chromatography resin (100–200 mesh, Beijing Research Institute of Chemical Engineering and Metallurgy, China) as shown in Fig. 1. Briefly, (1) Add 243Am spike solution of ~105 Bq to a beaker and dilute to 0.1 M HNO3 with deionized water. (2) The solution is passed through a HDEHP extraction chromatography resin column (0.75 cm i.d. × 10 cm long) which is pre-equilibrated with 15 ml 0.1 M HNO3 at a flow rate of 1 ml/min and washed with 10 ml 0.1 M HNO3 to improve the recovery of 239Np. The eluate is collected into a clean vessel. (3) The eluted 239Np in the vessel was measured by gamma-ray spectroscopy to check the yield of this isotope. (4) 243Am was later recovered by washing the column with 20 ml of 1 M HNO3.Fig. 1

Bottom Line: The neptunium in the soil is separated by thenoyl-trifluoracetone extraction from 1 M HNO3 solution after reducing Np to Np(IV) with ferrous sulfamate, and then purified with Dowex 1 × 2 anion exchange resin. (239)Np in the resulting solution is measured with gamma-spectrometry for chemical yield determination while the (237)Np is measured with MC-ICP-MS.Measurement results for soil samples are presented together with those for two reference samples.By comparing the determined value with the reference value of the (237)Np activity concentration, the feasibility of the procedure was validated.

View Article: PubMed Central - PubMed

Affiliation: Northwest Institute of Nuclear Technology, Xi'an, 710024 Shaanxi People's Republic of China.

ABSTRACT

A radiochemical procedure is developed for the determination of (237)Np in soil with multi-collector inductively-coupled plasma mass spectrometry (MC-ICP-MS) and gamma-spectrometry. (239)Np (milked from (243)Am) was used as an isotopic tracer for chemical yield determination. The neptunium in the soil is separated by thenoyl-trifluoracetone extraction from 1 M HNO3 solution after reducing Np to Np(IV) with ferrous sulfamate, and then purified with Dowex 1 × 2 anion exchange resin. (239)Np in the resulting solution is measured with gamma-spectrometry for chemical yield determination while the (237)Np is measured with MC-ICP-MS. Measurement results for soil samples are presented together with those for two reference samples. By comparing the determined value with the reference value of the (237)Np activity concentration, the feasibility of the procedure was validated.

No MeSH data available.


Related in: MedlinePlus