The Rapid Discrimination and Quality Assessment of Three Zanthoxylum Species Using ¹H NMR Spectrometry

Table 1

Precision for ¹H NMR signals of xanthoxylin for proton (ppm); intraday, RSD (%); and interday, RSD (%).

Proton (ppm)	Intraday, RSD (%)	Interday, RSD (%)
4-OCH3 (3.82)	4.43	2.50
6-OCH3 (3.85)	4.42	2.55