Synergy of flow injection system and molecular recognition technology products for rapid determination of 89,90Sr and 210Pb
| Autor: | Ivana Tucaković, Željko Grahek, Ivana Coha, Silvia Dulanská |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Detection limit
Strontium Chromatography Elution Analytic Chemistry Sample (material) 010401 analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Mass spectrometry Molecular recognition Separation 210Pb 89 90Sr 140Ba 01 natural sciences 0104 chemical sciences Analytical Chemistry Matrix (chemical analysis) Interdisciplinary Natural Sciences Radiation Science chemistry Scintillation counter Solid phase extraction 0210 nano-technology |
| Zdroj: | Talanta |
| DOI: | 10.1016/j.talanta.2020.121959 |
| Popis: | A rapid, automated separation procedure was developed for radioactive strontium and lead isotope determination. This system includes a portable automated system for the preconcentration and sequential elution of targeting isotopes with an Na2H2EDTA solution from solid phase extraction materials, AnaLig®Sr-01 and SuperLig®620, provided by IBC Technologies. Strontium and lead were separated from the majority of matrix constituents to obtain pure fractions of Pb and Sr prior to radiometric detection. In case of barium presence, it can also be fully isolated and completely separated from Sr. The automated procedure can be successfully used for preconcentration and separation from high as well as low radioactivity samples. With only a 1 mL column filled with SuperLig®620, it is possible to isolate Sr and Pb with 100% recovery from 1 L to 2 L of sample at a flow rate of up to 10 mL min−1 within several hours. 89,90Sr isotopes can be further determined by Cherenkov counting, while 210Pb isotopes can be determined by either gamma spectrometry or liquid scintillation counter. The method was tested and validated using certified standard materials and proficiency test samples. The synergy of automated separation and detection procedures enables the determination of the low level activity of 90Sr and 210Pb in a short time with detection limits of 20 mBq L−1 for both isotopes. The proposed method enables lower labour costs, minimal size of apparatuses and columns, low separation time, and reduced secondary waste production. The automated procedure may be easily implemented in laboratories worldwide and can also be used at sampling sites. |
| Databáze: | OpenAIRE |
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