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Preliminary investigation of aluminium fluoride complexes in aqueous solutions with capillary electrophoresis coupled with electrospray ionization mass spectrometry and with inductively coupled plasma mass spectrometry
Author(s) -
Tanaka Miho,
Hoshino Yoko,
Nakamoto Daisuke
Publication year - 2019
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.8499
Subject(s) - chemistry , inductively coupled plasma mass spectrometry , mass spectrometry , capillary electrophoresis , electrospray ionization , aqueous solution , electrospray , analytical chemistry (journal) , capillary electrophoresis–mass spectrometry , detection limit , fluoride , chromatography , inorganic chemistry
Rationale It is crucial to identify and confirm the original species of aluminium ions (Al 3+ ) dissolved in water, since they behave differently. Depending on their species, the toxicity differs. Capillary electrophoresis (CE) coupled with electrospray ionization mass spectrometry (ESI‐MS) and CE coupled with inductively coupled plasma mass spectrometry (CE/ICP‐MS) were explored to identify and determine simple systems of Al species solutions at pH 3.0. Methods The new combinations of techniques, namely, ESI‐MS coupled with CE for identification of species and ICP‐MS coupled with CE for confirmation, were applied to for the analyses of Al and fluoride (F) solutions. Results Al monomers, some Al dimers and trimers were detected by CE/ESI‐MS. CE/ICP‐MS experiments were conducted with the assembled interface. As a result, the calibration line showed R 2 = 0.9856, and the detection limits were 35 nL and 0.037 μM. The results were compared with data obtained using MINEQL+. Conclusions Most of the Al species detected were monomers; some dimers and trimers were detected by CE/ESI‐MS, but they were not detected by CE‐ICP‐MS, probably owing to extremely low concentrations. The Al speciation technique was improved by CE/ESI‐MS, and the Al species present at extremely low concentrations were ascertained by CE/ICP‐MS. The use of coupled instruments will be one of the most powerful tools for identifying dissolved metal ions.