Procedures for the assay of alpha-particle emitters in water samples

Crespo, M.T.; Gascón, J. L.; Aceña, M.L.

doi:10.1016/0883-2889(92)90073-n

Cited by 14 publications

(2 citation statements)

References 11 publications

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“…The known chemical procedures for the determination of 226 Ra in different matrixes are usually time-consuming processes. They are based on many chemical steps, which become tedious and difficult to apply routinely, so many radiochemists prefer the analysis of radon and/or radon daughters to evaluate the radioactivity of natural samples. − Radon activity, however, is seldom related to the presence of radium, and radium analysis becomes imperative for those matrixes involved in nutrition, especially the infant diet. Two methods, , published recently, are based on the direct measurement of 226 Ra activity after isolation by a simple chemical procedure, such as electrodeposition or solvent extraction.…”

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confidence: 99%

Procedure for Analysis of Radium in Freshwaters by Adsorption on Basic Lead Rhodizonate

1998

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Radium analysis is carried out by batch adsorption from natural waters on basic lead rhodizonate supported on charcoal, LERHO, starting from 2-L samples. 133Ba is added to allow the measurement of the overall chemical yield by gamma counting. Radium is recovered with a few milliliters of 1.5 M HCl, and lead is removed by a chromatographic column filled with Dowex 2 x 8. Finally 50 micrograms of barium carrier is added, and the radium is coprecipitated as sulfate on a preformed bed of barium sulfate, to prepare a sample suitable for alpha and gamma counting. The detection limit of the proposed method is 0.002 Bq/L 226Ra. This value is far beyond the radium activity admissible for drinking waters. Due to lack of appropriate samples, the procedure was tested using mineral waters spiked with 226Ra and two commercially available mineral waters with very low radium contents.

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confidence: 99%

Procedure for Analysis of Radium in Freshwaters by Adsorption on Basic Lead Rhodizonate

1998

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“…One such approach has been described in detail by Crespo et al (1992). These methods eliminate the need for preservation, storage, evaporation or coprecipitation of large water samples.…”

Section: Alpha Particle Spectrometrymentioning

confidence: 99%

Measurements of Radioactivity

Valković

2000

Radioactivity in the Environment

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Preliminary results on the Immobilisation of Radionuclides from Waters with Specific Adsorbers Based on Phosphate Salts

et al. 2004

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The present paper is focused on the ability of aluminium phosphate (ALPC), magnesium ammonium phosphate (MGPC), magnesium hydrogen phosphate (MGHPC), and calcium hydrogenphosphate (CAHPC), adsorbed onto charcoal, to immobilise actinides by adsorption from natural waters. The objective of this process is to evaluate the environmental pollution due to the actinides. Europium, thorium, protactinium, neptunyl, and uranyl ions were chosen to simulate actinides in the +3, +4, +5 and +6 oxidation state. The adsorbers were tested using natural waters samples. The adsorption trends and capacities were analysed. ALPC and MGPC exhibited a similar behaviour and adsorbed demonstrating that the +5, +4 and +3 actinide ions can be easily immobilised from natural waters and may be successfully used at pH 7-8. MGHPC may be used at a higher pH, whereas CAHPC is effective in the whole pH range. In all cases, thorium, protactinium and europium were strongly

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Procedures for the assay of alpha-particle emitters in water samples

Cited by 14 publications

References 11 publications

Procedure for Analysis of Radium in Freshwaters by Adsorption on Basic Lead Rhodizonate

Procedure for Analysis of Radium in Freshwaters by Adsorption on Basic Lead Rhodizonate

Measurements of Radioactivity

Preliminary results on the Immobilisation of Radionuclides from Waters with Specific Adsorbers Based on Phosphate Salts

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