Figure 1. 1H-NMR of ASA in d-chloroform, recorded with a 60 MHz instrument from Magritek. The resonance at 11.89 ppm is from the acid proton, the resonance around 7.5 ppm are from the aromatic protons and the resonance at 2.43 is from the methyl group

From

Introducing NMR to Biomedical Laboratory Scientists through a Laboratory Exercise; Synthesis, Structure Determination and Quantization of Aspirin by Employing an 1H-NMR Bench Top Instrument

Marit Kristin Leiren, Signe Steinkopf

World Journal of Chemical Education. 2022, 10(1), 8-19 doi:10.12691/wjce-10-1-2