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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.


Gamma-spectrum of purified 239Np
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Fig4: Gamma-spectrum of purified 239Np

Mentions: The 239Np intended as a tracer for 237Np was obtained from 243Am as described above. In order to assure the suitability of the 239Np as a tracer, its purity was checked with a HPGe gamma-spectrometer. Figure 3 shows the gamma-ray spectrum of 243Am in equilibrium with 239Np before separation. The peaks of both 239Np (277.6 keV) and 243Am (74.7 keV) appear clearly in the spectrum. However, when 239Np was separated from 243Am parent and checked with a HPGe gamma-spectrometer, only the peak of 239Np can be seen in the spectrum and no lines for 243Am are distinguishable in the spectrum (see Fig. 4).Fig. 3


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)

Gamma-spectrum of purified 239Np
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig4: Gamma-spectrum of purified 239Np
Mentions: The 239Np intended as a tracer for 237Np was obtained from 243Am as described above. In order to assure the suitability of the 239Np as a tracer, its purity was checked with a HPGe gamma-spectrometer. Figure 3 shows the gamma-ray spectrum of 243Am in equilibrium with 239Np before separation. The peaks of both 239Np (277.6 keV) and 243Am (74.7 keV) appear clearly in the spectrum. However, when 239Np was separated from 243Am parent and checked with a HPGe gamma-spectrometer, only the peak of 239Np can be seen in the spectrum and no lines for 243Am are distinguishable in the spectrum (see Fig. 4).Fig. 3

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.