A new rapid protocol for 226Ra separation and preconcentration in natural water samples using molecular recognition technology for ICP-MS analysis

Screening of synthesis conditions for the development of a radium ion-imprinted polymer using the dummy template imprinting approach

“…As a remark, Sr(II), Tl(I), and Pb(II) also have affinity for the commercial AnaLig® Ra-01 resin, which is currently the most specific SPE support available for Ra(II) extraction. However, Verlinde et al were able to find successful conditions to eluate these interfering ions before Ra(II) [16]. Some attempts were thus made to modify the washing conditions in order to improve the specificity as it will be described in section 3.3.2.…”

“…AnaLig® Ra-01 is the only Ra-specific resin available on the market but it is expensive, probably due to the cost of the synthesis of the macrocyclic ligand that it contains. Moreover, it requires the use of an organic complexing agent for Ra 2+ elution which is not fully compatible with ICP-MS analysis depending on the introduction system employed [15,16]. The development of ionimprinted polymers (IIPs) appears as an alternative to increase sorbent specificity and to allow Ra 2+ elution with ICP-MS compatible solutions, and this at a much lower cost since they are most of the time prepared from commercial reagents.…”

The analysis of 226Ra in 1‐liter seawater by isotope dilution via single‐collector sector‐field ICP‐MS

“…An Apex‐IR desolvating nebulizer (ESI) was used to minimize formation of molecular interferences (Lariviere et al 2006) and increase sensitivity. Verlinde et al (2019) demonstrated the superior performance of the Element 2 ICP‐MS in combination with an Apex‐Q compared to other ICP‐MS instruments, presenting a detection limit as low as 0.024 fg g −1 . Typical sensitivities of our system in this setup are around 12 million cps μ g −1 L −1 in low resolution.…”

“…The features and weaknesses of each radiometric and mass spectrometric method have been highlighted in relevant reviews (Lariviere et al 2006;Hou and Roos 2008;Jia and Jia 2012;Al-Hamarneh and Almasoud 2018;Thakur et al 2021). Advantages of mass spectrometry compared with conventional decay counting methods are higher precision and fast analysis (a couple of minutes), and smaller sample volumes (< 100 mL vs. 20-1000 L) (Cohen and O'Nions 1991;Larivière et al 2005;Lagacé et al 2017;Verlinde et al 2019). However, although previous methods have efficiently measured 226 Ra by mass spectrometry, there is little consensus on the optimal technique.…”

“…Yang et al (2020) showed that polyatomic interferences from Pb and Bi oxides and hydroxides can only be resolved at a resolution higher than 4000. Verlinde et al (2019) showed that formation of these interferences strongly depends on the sample introduction system. Isobaric interferences can be resolved in high‐resolution mode (FWHM = 10,000), although there is a substantial loss in sensitivity (Varga 2008).…”