Abstract
The transverse relaxation time (T2), measured using a benchtop time-domain nuclear magnetic resonance (TD-NMR) relaxometer, was evaluated as a potential analytical method to quantify methanol as an adulterant in commercial ethanol. The T2 measurements, using the Carr-Purcell-Meiboom-Gill pulse sequence, can be performed in a non-destructive manner, within a few seconds and without sample preparation. The T2 value shows a linear correlation with methanol concentration in ethanol, capable of predicting the methanol adulteration with a high determination coefficient (r2 = 0.99). Therefore, TD-NMR can be used as simple, rapid, non-destructive and cheap analytical method to quantify the presence of methanol in ethanol fuel.
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