Table 5.

Performance parameters of PLS regression models for the prediction of rosmarinic acid content C_RA in Rosmarinus officinalis, folium. Reproduced with permission from Royal Society of Chemistry, Ref. [75].

Spectrometer		NIRFlex N-500		microPHAZIR		MicroNIR 2200
samples		60		60		60
outliers		6		8		4
CRA (w/w) range/%		1.138–2.425		1.138–2.425		1.138–2.425
validation method		CV	TSV	CV	TSV	CV	TSV
R 2		0.91	0.91	0.73	0.73	0.84	0.85
SECV/%	SEP/%	0.072	0.069	0.12	0.11	0.091	0.11
SECV/SEC	SEP/SEC	1.46	1.43	1.28	1.24	1.55	2.09
factors		8	8	5	5	11	12
RPD		3.27	3.41	1.88	2.06	2.46	2.14

Abbreviations: CV—cross validations; TSV—test-set validation; SECV—standard error of cross validation; SEP—standard errors of prediction; SEC—standard error of calibration; C_RA —rosmarinic acid content (w/w).