ERETIC implemented in diffusion-ordered NMR as a diffusion reference.

Area of Science:

• Nuclear Magnetic Resonance (NMR) Spectroscopy
• Analytical Chemistry
• Materials Science

Background:

• The Electronic Reference To access In vivo Concentrations (ERETIC) technique generates an electronic signal in NMR spectrometers.
• This signal is detected simultaneously with the sample Free Induction Decay (FID) during acquisition.
• ERETIC implementation in 2D DOSY experiments allows for a reference signal within the spectrum.

Purpose of the Study:

• To implement the ERETIC sequence within 2D DOSY experiments.
• To generate a reference signal with simulated diffusion behavior directly in the 2D DOSY spectrum.
• To evaluate the precision, accuracy, scope, and limitations of DOSY data treatment algorithms.

Main Methods:

• Integration of the ERETIC sequence into standard bipolar pulsed field gradient longitudinal eddy current delay (LED) sequences.
• Application to various published algorithms for analyzing 2D DOSY spectra.
• Utilized simulated model systems representing discrete and continuous diffusion profiles in mono- and bi-Gaussian regimes.

Main Results:

• The ERETIC-DOSY approach successfully generated a reference signal with well-defined diffusion behavior.
• This enabled direct evaluation of different DOSY data treatment algorithms.
• Insights into the performance of algorithms across various diffusion regimes were obtained.

Conclusions:

• The ERETIC technique provides a robust internal standard for validating 2D DOSY data analysis.
• It enhances the reliability and interpretability of diffusion measurements in complex systems.
• This method offers a valuable tool for assessing the performance of quantitative DOSY algorithms.