1. Mass-shift mode to quantify low level 129I in environmental samples by ICP-MS/MS.
- Author
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Coralie, Carrier, Azza, Habibi, Michelle, Agarande, Celine, Augeray, Didier, Bourles, Denis, Maro, and Lucilla, Benedetti
- Subjects
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ENVIRONMENTAL sampling , *VITAMIN C , *DETECTION limit , *ACCELERATOR mass spectrometry - Abstract
In this study, a new measurement method to quantify 129I at low level by ICP-MS/MS (Agilent 8900) was developed. This new method is based on a new measurement medium and mass-shift mode. The developed measurement medium is composed of 0.1% NH4OH, 10 g L−1 ascorbic acid and 3% Tween® 20 which considerably decrease the memory effect and increase the sensitivity. Different reactional gases were compared in on-mass and mass-shift modes and finally, O2 was selected in mass-shift mode. The mass-shift mode with O2 allows having the most quantitative iodine oxidation rate while eliminating isobaric and polyatomic interferences. Isobaric interference due to 129Xe+ is eliminated following a charge transfer in the reaction/collision cell and polyatomic interferences are eliminated with the second quadrupole. This new measurement method improves the limit of detection of 129I to 11 mBq L−1, without chemical treatment. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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