Skip to main content Skip to navigation

Ramon Sanchez

Ramon Sanchez

Education

  • B.sC. in Chemical engineering - GPA 3.82 (2011-2015)

Universidad Nacional Pedro Henriquez Urena (UNPHU)

  • MSc in Analytical Science and Instrumentation (Current)

The University of Warwick

Projects

  • Probing the molecular interactions between solute and stationary phase in hydrophilic interaction chromatography (HILIC) by HRMAS NMR.

abstract:

The main objective of this project is to characterize the water layer formed on the surface of the bare silica and amide HILIC stationary phases in the presence of different mobile phases. Using 1H high-resolution magic angle spinning (HRMAS) NMR we have obtained first ever direct experimental evidence of the existence of such layer, which manifested as a distinct peak in the NMR spectra. In order to characterise the mobility of the water in the layer and how it relates to HILIC conditions, we measured 1H longitudinal (T1) and transverse (T2) relaxation using two stationary phases (SPs), various mobile phases involving mixtures of water and acetonitrile with trifuoroacetic acid and ammonium formate as modifiers, and in the presence and absence of the following analytes: benzenesulfonic acid, procainamide and uridine. A surprising effect of the AcN ratio on the formation of the water layer was observed. The behaviour of the water layer under the influence of the test analytes validated that ionisation of the functional groups on the stationary phases and hydrogen bonds within the analytes and mobile phase and analytes and SPs are involved in the complex mechanism.

Certifications

  • Universidad Nacional Pedro Henriquez Urena (UNPHU)

Teaching qualification. 2016.

  • International Atomic Energy Agency – Intergovernmental Oceanographic Commission (IAEA-IOC)

Regional Training Course on Toxin Data Management. 26-30 October 2015, Santo Domingo, Dominican Republic.

  • International Atomic Energy Agency – Intergovernmental Oceanographic Commission (IAEA-IOC)

Regional Training Course on Ciguatera Fish Poisoning Field Monitoring. 02 – 07 november 2015, Santo Domingo, Dominican Republic.

Experience

• Chemistry lecturer 
Universidad Nacional Pedro Henriquez Urena (UNPHU), Dominican Republic