Quality control strategy for the determination of 210Po

Woittiez, J. R. W.; Sloof, Joyce E.; Kroon, Koos J.

doi:10.1007/bf00322329

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…4 The resin was applied to the separation of Pb ( 210 Pb) for measurements by thermal ionization mass spectrometry 5 , graphite furnace atomic absorption spectrometry 6 and liquid scintillation counting. 7 However, the distribution coefficients for Fe and Cu on the resin in a HNO 3 and HCl solution are not available in the literature.…”

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confidence: 99%

Determination of 210Pb and 210Po in Environmental Samples by Alpha Ray Spectrometry Using an Extraction Chromatographic Resin

1999

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210 Po (t 1/2 =138.38 d) occurs naturally via 210 Pb (t 1/2 =22.3 y) and 210 Bi (t 1/2 =5.15 d) in the 238 U decay chain. The contribution of 210 Pb, 210 Bi and 210 Po to the internal radiation dose to human has been estimated to be around 8%.1 Various analytical methods have been applied to the separation and determination of 210 Po. 2,3 Recently, a crown ether loaded extraction chromatographic resin (EiChroM Sr.Spec™) was applied to the selective separation of Pb and Po in several samples. Vajda et al. determined the distribution coefficients of Bi, Pb and Po on Sr.Spec™ in 0.5 -8 M HCl, and developed a large-column method for the separation of 210 Pb and 210 Po in standard samples. 4 The resin was applied to the separation of Pb ( 210 Pb) for measurements by thermal ionization mass spectrometry 5 , graphite furnace atomic absorption spectrometry 6 and liquid scintillation counting. 7 However, the distribution coefficients for Fe and Cu on the resin in a HNO 3 and HCl solution are not available in the literature.In this study, the weight distribution coefficients of Fe, Cu, Pb, Bi and Po on the resin in HCl and HNO 3 solutions were determined using a batch equilibrium method, after which the elution behavior of Po and several elements from the resin column was examined. Subsequently, the coprecipitation behavior of Pb and Po on CuS was examined. The plating condition was investigated for counting samples in the alpha ray spectrometry of Po. Moreover, the loss of Po in ashing samples was examined because of its volatility. From a series of investigations, it was found that Pb and Po were effectively isolated from interference elements using a Sr.Spec™ resin short column (2 ml).Finally, a combination of coprecipitation and Sr.Spec™ resin separation was developed for the determination of 210 Pb and 210 Po in several standard materials (sediments, soils) and biological samples (shellfish, seaweed) by alpha ray spectrometry. Experimental Alpha ray measurementsAn EG &G ORTEC Model 576A alpha ray spectrometer with a Canberra [passivated ion-implanted planar silicon (PIPS) detector having 450 mm 2 of an active area] was used for alpha ray measurements. The counting efficiencies, determined by measuring JRIA (Japan Radioisotope Association) standard uranium sources, were typically 20 -30% with this arrangement. The energy resolutions, determined with LMRI (Laboratoire de Métrologie des Rayonnements Ionisants, France) standard 243 Am sources, were typically 20 -40 keV full width at the half-maximum peak height (FWHM) at 5.47 MeV. TracerThe 208 Po tracer solution supplied by AEA Technology, UK was diluted to activity concentration of approximately 60 mBq/ml in 1 M HCl, and stored in a Teflon bottle. ReagentsAll of the reagents used were of analytical grade. Water was purified with an ORGANO PURIC Model-S Po were 0.6 mBq/sample at a counting time of 70000 s.

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confidence: 99%

Determination of 210Pb and 210Po in Environmental Samples by Alpha Ray Spectrometry Using an Extraction Chromatographic Resin

1999

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“…The precision of the method was tested on a standard phosphogypsum material, ECN-414 [10,11]. This material was prepared for a Dutch Intercomparison Exercise on radionuclides in industrial materials.…”

Section: Precisionmentioning

confidence: 99%

Determination of lead in phosphate ore and phosphogypsum

Sloof

Woittiez

Woroniecka

1996

Fresenius' Journal of Analytical Chemistry

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A method is presented for the lead determination in calcium phosphate and -sulphate matrices. Pb is separated from the matrix by solid-liquid extraction on a Pb-selective column ''Sr * Spec'' (Eichrom) and subsequently determined by graphite furnace atomic absorption spectrometry. The yield of the chemical separation is determined by using Pb. The method is suitable in principle for any material containing more than three times the standard deviation in the blank, being 30 g kg\ Pb. Application of the method to phosphogypsum, phosphate ore, phosphoric acid and (certified) reference materials such as soils, sediments, coal fly ash, citrus leaves and cabbage yielded accurate Pb results.

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Quality control strategy for the determination of 210Po

Cited by 2 publications

References 3 publications

Determination of 210Pb and 210Po in Environmental Samples by Alpha Ray Spectrometry Using an Extraction Chromatographic Resin

Determination of 210Pb and 210Po in Environmental Samples by Alpha Ray Spectrometry Using an Extraction Chromatographic Resin

Determination of lead in phosphate ore and phosphogypsum

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