Determination of 226Ra and 224Ra in drinking waters by liquid scintillation counting

Manjón, G.; Vioque, I.; Moreno, H.; Garcı́a-Tenorio, R.; García-León, M.

doi:10.1016/s0969-8043(96)00297-7

Cited by 35 publications

(16 citation statements)

References 2 publications

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“…The low background of the detector allows the measurement of low-level activities. Moreover, alpha and beta activity from the same sample can be measured simultaneous and separately (alpha and beta spectra) by using its pulse shape analyser (PSA) [6]. The PSA was optimised by measuring a 239 Pu and 241 Am standard samples, under the typical measurement conditions, at different values of the PSA threshold level.…”

Section: Liquid Scintillation Countermentioning

confidence: 99%

Application of a liquid scintillation counter to the measurement of tracing radioactivity in experiments on suspended matter uptake in aquatic environments

et al. 2002

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Abstract, The experiments on the study of the kinetic transfer coefficients of conservative and non-conservative radionuclides, in aquatic environments, need to determine radionuclide activity in large number of samples. Different radioactivity measurement techniques can be selected for analyses, but the liquid scintillation technique is preferred due to its easy sample treatment and its low time consumption. Samples are initially traced with a known activity of a selected radionuclide ( 239 Pu, MI Am or "Tc). The transference of radionuclides, from the water to the suspended matter, is studied through the determination of the residual activity in aliquots of water sample, which are successively collected with time. In this work, we present the experimental procedures used for the 239 Pu, 241 Am and "Tc activity measurement by liquid scintillation counting, using a Wallac Quantulus 1220 spectrometer. Results of the application of this technique to traced water samples are also shown in this study.

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Section: Liquid Scintillation Countermentioning

confidence: 99%

Application of a liquid scintillation counter to the measurement of tracing radioactivity in experiments on suspended matter uptake in aquatic environments

et al. 2002

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“…where N is the net total alpha counting rate, taking in account the values ofx~ and ~ when cocktail Hisafe 3 was used, and 5226(t) is the time parameter calculated using the Bateman equations, which is used to calculate the a-activity increase due to 226Ra daughters [6].…”

Section: Equipment: Description Calibration and Measurementsmentioning

confidence: 99%

“…For the determination of 226Ra activity by means of the 214 Po alpha peak, its total efficiency, ~'Ra, was calculated using the net counting rate of the 214Po window [6].…”

Section: Equipment: Description Calibration and Measurementsmentioning

confidence: 99%

“…Radium isotopes were separated as Ra-BaSO4 [6]. 0.5 L of previously acidified water sample was first filtered using a Millipore filter (0.45 ~tm pore size) and neutralized with NH4OH.…”

Section: Introductionmentioning

confidence: 99%

“…However, another finding can be derived. The confidence that no interferences are present in the samples, allows us to try the determination of the 224Ra activity concentration present in these waters [6]. In this case, two successive measurements are taken in account.…”

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An easy method for Ra-226 determination in river waters by liquid-scintillation counting

et al. 1999

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226Ra activity concentration in river water was determined using a low background liquid scintillation counter. Radium was extracted from the samples as Ra-BaSO4 precipitate which, afterwards, was dissolved with EDTA in ammonia medium. Solution was transferred into a low potassium glass vial and then mixed with a scintillation cocktail. Two different scintillation cocktails were selected for comparison. Efficiency, recovery yield and a/~ separation were studied with both liquid scintillation cocktails. One single measurement, made one month after radium separation, allows to calculate the 226Ra concentration as well as to assess the presence of alpha contamination of the sample. In the case of negligible interferences, 224Ra concentrations can be subsequently evaluated in the same sample by the measurement made just after chemical separation of radium. This method has been applied for the determination of 226Ra and 224Ra activity concentrations in river water collected from different locations along the Odiel river estuary area (South-west of Spain). The presence of chemical industry, the wastes of which are released into the river, could be connected with radium activity concentration enhancements in the water.

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Scintillation Detectors

Garcı́a-León

2022

Detecting Environmental Radioactivity

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Determination of 226Ra and 224Ra in drinking waters by liquid scintillation counting

Cited by 35 publications

References 2 publications

Application of a liquid scintillation counter to the measurement of tracing radioactivity in experiments on suspended matter uptake in aquatic environments

Application of a liquid scintillation counter to the measurement of tracing radioactivity in experiments on suspended matter uptake in aquatic environments

An easy method for Ra-226 determination in river waters by liquid-scintillation counting

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