AI Article Synopsis
- Researchers used high resolution electrospray ionization mass spectrometry (ESI-HRMS) to explore how molybdate interacts with halides (Cl, F, Br) in solution.
- The study found new molybdate species, including chloro(oxo)molybdate and fluoro(oxo)molybdate, and detected MoOCl for the first time in natural samples.
- The research demonstrated that ESI-HRMS is an effective method for quickly assessing the speciation of inorganic compounds like molybdate, despite some challenges in analyzing certain acid-base properties.
Article Abstract
High resolution electrospray ionization mass spectrometry (ESI-HRMS) was used to study the speciation of molybdate in interaction with halides (Cl, F, Br). Desolvation during electrospray ionization induced alteration of aqueous species but method optimization successfully suppressed artefact compounds. At low Mo concentrations, chloro(oxo)molybdate and fluoro(oxo)molybdate species were found and in natural samples, MoOCl was detected for the first time, to the best of our knowledge. Apparent equilibrium constants for Cl substitution on molybdate were calculated for a range of pH values from 4.5 to 8.5. A minor alteration in speciation during the gas phase (conversion of doubly charged MoO to HMoO) did not allow investigation of the molybdate acid-base properties; however this could be determined by speciation modeling. This study provides further evidence that ESI-HRMS is a fast and suitable tool to Deceasedassess the speciation of inorganic compounds such as Mo.
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| http://dx.doi.org/10.1016/j.talanta.2017.11.001 | DOI Listing |
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