While EPR is a powerful tool, it has some limitations:
Sensitivity: EPR is less sensitive than some other spectroscopic techniques, making it challenging to study systems with low concentrations of paramagnetic species. Sample Preparation: Some samples require specific conditions, such as low temperatures, which can complicate the experimental setup. Complex Spectra: The interpretation of EPR spectra can be complex due to overlapping signals and the presence of multiple paramagnetic species.