Table 2.

Comparison of the individual and total carotenoid content of samples extracted with and without BHT.

Carotenoid	With BHT (μg/g DW)	Without BHT (μg/g DW)	t Calculated	t Critical	Degree of freedom a
Astaxanthin	8.18 ± 0.06	8.22 ± 0.06	0.76	2.78	4
Adonixanthin	2.46 ± 0.03	2.51 ± 0.11	0.80	2.78	4
Zeax+lut	2.25 ± 0.11	2.37 ± 0.36	0.56	2.78	4
Adonirubin	1.52 ± 0.02	1.52 ± 0.01	0.36	2.78	4
Canthaxanthin	0.98 ± 0.00	0.96 ± 0.05	0.47	2.78	4
Total carotenoids	15.39 ± 0.16	15.84 ± 0.58	1.29	2.78	4

^a α = 0.05; abbreviations: Zeax+lut, sum of the concentrations of zeaxanthin and lutein; total carotenoids, total carotenoid content.