On-line pseudo-stationary magnetic solid-phase extraction using magnetic cation exchange microparticles and its application to the determination of strontium

Ayala, Alejandro; Takagai, Yoshitaka

doi:10.1039/c8ja00088c

Cited by 11 publications

(7 citation statements)

References 17 publications

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“…Furthermore, ICP-MS requires a calibration curve for 90 Sr quantification, and thus needs to analyze radioactive 90 Sr reference samples daily. Although previous TIMS-based approaches have reported LODs of 0.2 fg (1 mBq) for 90 Sr, they require additional Sr quantification by other methods, which consumes additional amounts of sample and propagates analytical errors of several % ,, onto more precise isotopic data. Based on these comparisons, ID-TE-TIMS is the method of choice for 90 Sr quantification, especially for size-limited sampling.…”

Section: Resultsmentioning

confidence: 99%

Isotope Dilution–Total Evaporation–Thermal Ionization Mass Spectrometric Direct Determination of Radioactive Strontium-90 in Microdrop Samples

et al. 2020

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Thermal ionization mass spectrometry (TIMS) was used to directly quantify an ultratrace of radioactive 90 Sr in microliter droplet samples. No chemical separation was required in removing isobaric interferences on M = 90 such as 90 Zr and organic molecules in the mass spectrum because the difference in evaporation and ionization (emission) temperature among organic molecules, Zr and Sr, allows us to control the emission manner and significantly suppress the isobaric interferences. Direct quantification was achieved by improving the intercalibration of Faraday cups and ion counting in an isotope dilution (ID) method. Furthermore, the use of a total evaporation method (TE) enhanced the detection efficiency by the complete collection of the 90 Sr ion beam from the samples and minimized the complexity of the fractionation effect in the isotope ratio calculation. In this study, 1 fg of 90 Sr (equal to activity of 5 millibecquerel (mBq)) in a very low-volume sample with 10 8 times greater isobaric interference from 90 Zr was successfully measured using the proposed ID-TE-TIMS method. The limit of detection was 0.029 fg (equal to 0.15 mBq) without any preconcentration. To demonstrate the wide usability of this method, low-volume samples of tears, eyelashes, saliva, environmental standards, and water samples (i.e., seawater and ground water) were analyzed within 1 h. The relationship of the measured values between this ID-TE-TIMS method and a radiometric analysis was shown to have good linearity.

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Section: Resultsmentioning

confidence: 99%

Isotope Dilution–Total Evaporation–Thermal Ionization Mass Spectrometric Direct Determination of Radioactive Strontium-90 in Microdrop Samples

et al. 2020

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“…89 Recoveries were between 99% and 102% for Ni, 88 and between 100% and 105% for Sr in both SPE methods. 88,89 These procedures provided LODs of 0.25 and 3.56 mg L À1 for Sr and Ni, 88 respectively; and 0.59 mg L À1 for Sr using the magnetic SPE. 89 Dispersive SPE (DSPE), using magnetite-graphene oxide (m-GO) as a sorbent material, was used by Ahmad et al for Au determination in environmental water samples by MIP-OES.…”

Section: Sample Preparationmentioning

confidence: 93%

“…88 An on-line magnetic solid phase extraction (MSPE), based on chemically immobilizing silica with diethyl sulfone groups to preconcentrate Sr, was also described. 89 Recoveries were between 99% and 102% for Ni, 88 and between 100% and 105% for Sr in both SPE methods. 88,89 These procedures provided LODs of 0.25 and 3.56 μg L −1 for Sr and Ni, 88 respectively; and 0.59 μg L −1 for Sr using the magnetic SPE.…”

Section: Recent Studies and Strategies To Overcome Mip-oes Limitationsmentioning

confidence: 93%

“…88,89 These procedures provided LODs of 0.25 and 3.56 mg L À1 for Sr and Ni, 88 respectively; and 0.59 mg L À1 for Sr using the magnetic SPE. 89 Dispersive SPE (DSPE), using magnetite-graphene oxide (m-GO) as a sorbent material, was used by Ahmad et al for Au determination in environmental water samples by MIP-OES. The preconcentration procedure resulted in an improved LOD (0.005 mg L À1 ), 90 and recoveries ranging from 97.0% to 101%.…”

Section: Sample Preparationmentioning

confidence: 99%

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Is MIP-OES a suitable alternative to ICP-OES for trace element analysis?

Fontoura

Jofré

Williams

et al. 2022

J. Anal. At. Spectrom.

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“…In particular, it is imperative to monitor 90 Sr over a long period because it will require several decades to decommission F1-NPP. In Japan, instead of a few literature concerning the development of a rapid analytical means, − radiochemical analysis using milking-low background gas-flow counter (milking-LBC) is adopted as the official analysis method for analyzing 90 Sr because of good sensitivity and/or high-precision analysis in low concentration levels in the environment . This method requires considerable amount of time and effort to pretreat the analysis as compared to those required by the γ-ray measurement method.…”

Section: Introductionmentioning

confidence: 99%

Determination and Comparison of the Strontium-90 Concentrations in Topsoil of Fukushima Prefecture before and after the Fukushima Daiichi Nuclear Accident

Konno

Takagai

2018

ACS Omega

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To precisely understand the status of scattered strontium-90 ( 90 Sr) after the 2011 accident at the Fukushima Daiichi Nuclear Power Plant (F1-NPP) of Tokyo Electric Power Company (TEPCO), the measurement of the soil samples collected both before and after the day of the accident from the same sampling locations is necessary. However, very few reports have investigated the background contaminant data before the accident even though several studies have been conducted to investigate the effects of the F1-NPP accident. To address the lack of the passed 90 Sr information and reestablished baseline, this study focuses on the stored topsoil samples that are collected from the same sampling locations from the Fukushima Prefecture before and after the F1-NPP accident, which are analyzed for obtaining the 90 Sr concentrations. The results of our investigation exhibited that the 90 Sr concentrations in the Fukushima Prefecture soils ranged from 0.2 to 20.4 Bq/kg in the samples that were collected before the accident and from 1.37 to 80.8 Bq/kg in the samples that were collected after the accident from identical sampling locations. Further, the soil samples that were collected from 30 out of 56 locations displayed significant differences in terms of concentrations before and after the accident. In addition, the relations between the 90 Sr concentrations and the soil properties of the samples (organic content, pH, water content, and composition) were investigated, and it was found that the organic content and water content had a positive correlation with 90 Sr concentrations and, in contrast, the sandiness was shown to have a negative correlation with 90 Sr concentrations. The depth characteristics were also investigated. The aforementioned results indicate that this tendency would be observed even in the future.

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On-line pseudo-stationary magnetic solid-phase extraction using magnetic cation exchange microparticles and its application to the determination of strontium

Abstract: An on-line magnetic solid-phase extraction system was developed for Sr determination.

Cited by 11 publications

References 17 publications

Isotope Dilution–Total Evaporation–Thermal Ionization Mass Spectrometric Direct Determination of Radioactive Strontium-90 in Microdrop Samples

Isotope Dilution–Total Evaporation–Thermal Ionization Mass Spectrometric Direct Determination of Radioactive Strontium-90 in Microdrop Samples

Is MIP-OES a suitable alternative to ICP-OES for trace element analysis?

Determination and Comparison of the Strontium-90 Concentrations in Topsoil of Fukushima Prefecture before and after the Fukushima Daiichi Nuclear Accident

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