Feasibility of Individual Carotenoid Quantification in Mixtures Using UV-Vis Spectrophotometry with Multivariate Curve Resolution Alternating Least Squares (MCR-ALS)

Table 3

Total carotenoids in mg.kg-1 of fruit extracts obtained with HPLC, spectrophotometry, and spectrophotometry + MCR-ALS.

	Pink grapefruit juice (PGJ)	Tomato paste (TP)	Fresh kiwi (FK)	Apricot nectar (AN)	Kiwi-pineapple smoothie (KPS)
TC by HPLC	12.5 (0.9)^b	218.3 (19.4)^a	2.7 (0.1)^b	5.5 (0.5)^b	0.21 (0.1)^c
TC by spectrophotometry	11.8 (1.9)^b	226.8 (46.2)^a	6.4 (1.5)^b	8.4 (0.4)^b	0.74 (0.1)^c
TC by spectrophotometry + MCR-ALS	11.8 (1.9)^b	218.8 (38.9)^a	4.2 (1.1)^b	7.1 (0.3)^b	0.17 (0.1)^c

Values bearing different letters for the same parameter are significantly different (). Values in brackets are standard errors ‘TC’ for total carotenoids.