Table 3.

PLSR results for all instruments to predict the procyanidin content (mg/g), antioxidant capacity (µmol/g) and caffeic acid content (mg/g) of the samples.

	Procyanidin Content				Antioxidant Capacity				Caffeic Acid Content
Instrument	NIRS XDS	NIR-S-G1	MicroNIR	MicroPHAZIR	NIRS XDS	NIR-S-G1	MicroNIR	Micro- PHAZIR	NIRS XDS	NIR-S-G1	MicroNIR	MicroPHAZIR
Range (wl)	1100–2250	950–1650	950–1650	1630–2250	1100–2250	950–1650	950–1650	1630–2250	1100–2250	950–1650	950–1650	1630–2250
Pre-treat.	MSC	SG-25 + deTr + SNV	SG-21 + deTr + SNV	SG-11 + SNV	SG-21 + deTr + MSC	SG-21 + deTr + SNV	SG-11 + deTr + SNV	SG-11 + MSC	SG-21 + deTr + SNV	SNV	SG-21 + SNV	SG-11 + SNV
LV	4	12	11	6	3	4	6	10	4.000	8.000	14	10
RMSEC	0.948	1.329	2.167	2.165	0.202	0.379	0.478	0.400	0.018	0.026	0.031	0.039
R 2 C	0.983	0.967	0.919	0.913	0.976	0.918	0.863	0.905	0.984	0.963	0.951	0.915
RMSECV	1.012	1.629	2.530	2.391	0.214	0.403	0.528	0.456	0.019	0.031	0.038	0.045
R 2 CV	0.980	0.950	0.890	0.894	0.974	0.907	0.8331	0.877	0.982	0.951	0.929	0.890