Study of Acidified Aqueous Extraction of Phenolic Compounds from Hibiscus sabdariffa L. calyces

Table 2: Color parameters of the hibiscus calyces extracts prepared following the treatments defined by fractional factorial experimental design showed in (Table 1).

Treatments	L*	a*	b*	Chroma*
T1	35.03 ± 0.68^a	33.40 ± 0.69^a	19.88 ± 0.64^a	38.87 ± 0.92^a
T2	32.61 ± 0.67^ab	32.67 ± 0.78^ab	17.79 ± 0.81^ab	37.20 ± 1.07^ab
T3	31.14 ± 0.69^bc	29.82 ± 0.59^cde	15.24 ± 0.14^cd	33.49 ± 0.59^cde
T4	30.66 ± 0.21^bc	30.56 ± 0.16^bcd	16.64 ± 0.19^bc	34.80 ± 0.05^bcd
T5	31.22 ± 0.09^bc	31.09 ± 0.09^abc	16.26 ± 0.15^bc	35.08 ± 0.15^bc
T6	31.16 ± 0.92^bc	32.63 ± 0.95^ab	17.61 ± 0.99^abc	37.08 ± 1.30^ab
T7	29.59 ± 0.79^c	27.44 ± 0.74^e	12.91 ± 0.73^d	30.32 ± 0.98^e
T8	28.81 ± 0.99^c	28.24 ± 1.03^de	13.49 ± 0.52^d	31.30 ±1.16^de

Means followed by the same letters in the same columns do not differ by Tukey test at 5% probability.

Measures were performed in triplicate.