Table 2.

The evaluation of levulinic acid yield from ¹H-NMR spectra signals (the Kuznechanka variety is given as an example).

Compounds	Compared Signals	Number of H-Atoms	Integral Units	Units per H-Atom	Ratio	Amount in NMR Sample, Mole	Yield in Reaction, mg	Yield, % 1
HMDS	SiCH3	18	8.073	0.4485	1	9.41 × 10−6	---	---
Levulinic acid	CH2	2	1.027	0.5135	1.15	10.77 × 10−6	62.5	97

¹ Theoretical yield of levulinic acid from 0.1 g of starch is 64.4 mg. Yield calculated as ratio of practical and theoretical yields: 62.5/64.4 = 97(%).