Application of ICP-QMS for the determination of ultratrace-levels of 226Ra in geothermal water and sediment samples

Tsai, Tsung‐Lin; Lin, Chia-Chang; Wang, Tsung-Yuan; Wei, Hung-Ju; Men, Lee-Chung

doi:10.1007/s10967-010-0625-2

Cited by 13 publications

(1 citation statement)

References 32 publications

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“…For radiometric instruments, a limit of detection (LOD) of 55 fg/g (2.0 Bq/kg) was achieved for 226 Ra in edible parts of fish [24], while a 226 Ra concentration as low as 0.20 fg/g (0.0075 Bq/kg) was reported in blue mussel (Mytilus edulis) soft tissues [25]. Using a mass spectrometer, LODs of 2.8 fg/g (0.10 Bq/kg) and 0.40 fg/g (0.015 Bq/kg) were measured, respectively, in sediment [26], a matrix with a high inorganic content, and in human brain [27], a matrix enriched with organic compounds. Even with an absolute method for Ra measurement, a reoptimization and validation of the method is required for each matrix used.…”

Section: Introductionmentioning

confidence: 96%

Development, Optimization, and Validation of Radium-226 Measurement in Oyster, a Sentinel Organism by Mass Spectrometry

Landry,

Banville,

Clarisse

2023

Separations

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Radium-226 (226Ra) measurement in living organisms, such as the American oyster (Crassostrea virginica), is an analytical challenge: the matrix complexity and the extremely low Ra levels require a purification/preconcentration step prior to its quantification. In this study, 5 g of dry oyster soft tissues and 1.6 g of shell were both mineralized, preconcentrated on an AG50W-X8 and a strontium-specific resin, and measured using Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The volumes of digestate used in the method for both matrices were optimized to reach a high preconcentration factor without any risk of oversaturating the columns. Out of the 50 mL of digestates, 48 mL and 2.5 mL were determined as optimal volumes for soft tissues and shell, respectively. To obtain a higher preconcentration factor and a lower limit of quantification (LOQ) for shell samples, three aliquots of 2.5 mL digestate were run on three different sets of resins and, ultimately, combined for Ra analysis using ICP-MS. LOQs of 7.7 and 0.3 fg/g (260 and 11 µBq/g) were achieved for the oyster shell and soft tissues, respectively. The new protocols were applied on relevant samples: oyster soft tissues and shell from New Brunswick, Canada, and different types of reference materials, such as IAEA-470, oyster soft tissue and IAEA-A-12, and animal bones. 226Ra recovery of 105 ± 3% (n = 6) was achieved for IAEA-A-12 (animal bones), the closest available reference material to shell with a recommended value for 226Ra. Resin performances were investigated using 226Ra standard solution and real samples: each set of columns could be used more than 100 times without any significant reduction in Ra preconcentration efficiency. Although the method proposed and validated in this work was developed for oysters, it could easily be applied to other matrices by adjusting the volume of digestate run on the resins to avoid their oversaturation.

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Section: Introductionmentioning

confidence: 96%

Development, Optimization, and Validation of Radium-226 Measurement in Oyster, a Sentinel Organism by Mass Spectrometry

Landry,

Banville,

Clarisse

2023

Separations

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The behaviour of 226Ra in high-volume environmental water samples on TK100 resin

Russell

Ivanov

et al. 2017

J Radioanal Nucl Chem

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Accurate, low-level measurement of 226Ra in high volume water samples requires rapid pre-concentration and robust separation techniques prior to measurement in order to comply with discharge limits and drinking water regulations. This study characterises the behaviour of 226Ra and interfering elements on recently developed TK100 (Triskem International) extraction chromatography resin. Distribution coefficients over a range of acid concentrations are given, along with an optimised procedure that shows rapid pre-concentration and separation of 226Ra on TK100 resin is achievable for high volume (1 L) water samples without the need for sample pre-treatment.

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Environmental Liquid Scintillation Analysis

Passo¹,

Carter²

2012

Handbook of Radioactivity Analysis

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Application of ICP-QMS for the determination of ultratrace-levels of 226Ra in geothermal water and sediment samples

Cited by 13 publications

References 32 publications

Development, Optimization, and Validation of Radium-226 Measurement in Oyster, a Sentinel Organism by Mass Spectrometry

Development, Optimization, and Validation of Radium-226 Measurement in Oyster, a Sentinel Organism by Mass Spectrometry

The behaviour of 226Ra in high-volume environmental water samples on TK100 resin

Environmental Liquid Scintillation Analysis

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