Table 3.

Reaction, product parameters and DS obtained from stoichiometry and ¹H-NMR analysis of acetylated, propionylated, and butyrylated quinoa starch.

Volume Anhydride (mL)	Anhyd. (mol)	NaOH (g)	NaOH (mol)	Anhyd.–St. (mol)	Acyl (%)	DS (stoichiometry)	DS (1H-NMR)
Ac-A 1.60	0.01679	30.24	0.02091	0.01267	0.87	0.0331	0.0269 ± 0.0026
Prop-A 2.19	0.01683	31.94	0.02225	0.01141	1.04	0.0298	0.0250 ± 0.0015
But-A 2.84	0.01684	31.90	0.02222	0.01146	1.30	0.0300	0.0331 ± 0.0040
Ac-A 3.20	0.03357	60.72	0.04199	0.02515	1.72	0.0657	0.0562 ± 0.0020
Prop-A 4.37	0.03358	61.40	0.04277	0.02439	2.19	0.0637	0.0579 ± 0.0019
But-A 5.67	0.03362	64.03	0.04461	0.02263	2.53	0.0591	0.0598 ± 0.0053
Ac-A 4.80	0.05036	91.35	0.06317	0.03755	2.54	0.0981	0.0852 ± 0.0019
Prop-A 6.56	0.05042	92.38	0.06436	0.03648	3.25	0.0953	0.0943 ± 0.0002
But-A 8.51	0.05046	96.35	0.06713	0.03379	3.73	0.0883	0.0978 ± 0.0025
Ac-A 6.40	0.06715	120.45	0.08330	0.05100	3.42	0.1333	0.1105 ± 0.0058
Prop-A 8.75	0.06724	126.06	0.08783	0.04665	4.12	0.1219	0.1143 ± 0.0061
But-A 11.34	0.06724	129.36	0.09012	0.04436	4.84	0.1159	0.1229 ± 0.0065