Figure 10. Calculated percentage of methyl (red, closed circles) and ethyl (blue, open circles) salicylate in MS:ES binary mixtures determined from the integrated NMR terminal methyl peak vs. known MS gravimetric weight percentage. The R² value of 0.99926 indicates a strong degree of correlation between the spectroscopic- and mass-derived values, better than that calculated for the hydroxyl peaks

From

Compositional Analysis of Short-chain Alkyl (C1-C4) Salicylate Ester Mixtures by Various Quantitative Analytical Techniques

Ronald P. D’Amelia, Shreya Prasad, Mary T. Rooney

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