Fingerprint analysis of phenolic acid extract of Salvia miltiorrhiza by digital reference standard analyzer with one or two reference standards

Table 6 Comparison of different methods (17 columns for method establishment)

Method	Average t_R deviation /min	Identification rate/%	Number of positive columns^a
RRT	0.401	89.8	10
LCTRS	0.225	97.5	12
RRT + PDA	0.343	96.2	12
LCTRS + PDA	0.214	99.5	16

^aPositive columns were columns on which all peaks could be effectively separated and identified

ISSN: 1749-8546