Event Title

Reverse Phase Ion Pair Chromatographic Separation of Oxythiomolybdate and Oxythioperrhenate Mixtures

Location

CSU Ballroom

Start Date

20-4-2015 10:00 AM

End Date

20-4-2015 11:30 AM

Student's Major

Chemistry and Geology

Student's College

Science, Engineering and Technology

Mentor's Name

Trent Vorlicek

Mentor's Email Address

trenton.vorlicek@mnsu.edu

Mentor's Department

Chemistry and Geology

Mentor's College

Science, Engineering and Technology

Description

To fully exploit Mo and Re as redox proxies, the chemical transformations these metals undergo in sulfidic water must be well defined. While thermodynamic data have been used to predict the speciation of Mo and Re within anoxic waters, these predictions remain unsubstantiated because apt methodologies for quantifying the oxythiomolybdate (MoOxS4-x2-) and oxythioperrhenate (ReOxS4-x-) (x=0-4) anions within natural settings have yet to be developed. Thus, the involvement of the thiometallates in the sequestration pathways of Mo and Re remains speculative. To address this gap in knowledge, a reverse phase ion pair chromatographic (RP-IPC) method has been developed that is capable of separating all eight stable oxythiomolybdate and oxythioperrhenate anions. Efforts to couple the RP-IPC method with inductively coupled mass spectroscopy (ICP-MS) are underway. Once developed, the RP-IPC-ICP-MS method will be employed to quantify Mo and Re speciation in the euxinic water column of Green Lake (New York).

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Apr 20th, 10:00 AM Apr 20th, 11:30 AM

Reverse Phase Ion Pair Chromatographic Separation of Oxythiomolybdate and Oxythioperrhenate Mixtures

CSU Ballroom

To fully exploit Mo and Re as redox proxies, the chemical transformations these metals undergo in sulfidic water must be well defined. While thermodynamic data have been used to predict the speciation of Mo and Re within anoxic waters, these predictions remain unsubstantiated because apt methodologies for quantifying the oxythiomolybdate (MoOxS4-x2-) and oxythioperrhenate (ReOxS4-x-) (x=0-4) anions within natural settings have yet to be developed. Thus, the involvement of the thiometallates in the sequestration pathways of Mo and Re remains speculative. To address this gap in knowledge, a reverse phase ion pair chromatographic (RP-IPC) method has been developed that is capable of separating all eight stable oxythiomolybdate and oxythioperrhenate anions. Efforts to couple the RP-IPC method with inductively coupled mass spectroscopy (ICP-MS) are underway. Once developed, the RP-IPC-ICP-MS method will be employed to quantify Mo and Re speciation in the euxinic water column of Green Lake (New York).

Recommended Citation

Strong, Emma and Natalie Young. "Reverse Phase Ion Pair Chromatographic Separation of Oxythiomolybdate and Oxythioperrhenate Mixtures." Undergraduate Research Symposium, Mankato, MN, April 20, 2015.
http://cornerstone.lib.mnsu.edu/urs/2015/poster_session_A/41