Signals for water occur at different frequencies in 1 H NMR spectra depending on the solvent used ... Solvent Chemical Shift of H 2 O (or HOD) Acetone 2.8 Acetonitrile 2.1 Benzene 0.4 Chloroform 1.6 ...

This study presents efficient CaO/ZnO composite catalysts for biodiesel production from soybean oil, achieving 99% conversion ...