. 2019 Feb 19;5(3):212–218. doi: 10.1002/cre2.172

Table 2.

ΔL, Δa, Δb, and ΔE values of hematoporphyrin‐stained paper experiment

Group	ΔL	Δa	Δb	ΔE
KHCO₃	37.8 (1.6)^c	−30.1 (0.6)^a	−26.3 (0.9)^a	55.0 (1.6)^e
NaHCO₃	34.7 (1.3)^c	−29.8 (0.9)^a	−29.8 (0.9)^a	52.2 (1.5)^d
KOH	17.9 (2.1)^b	−21.6 (1.2)^b	−17.5 (0.8)^b	33.5 (2.0)^c
NaOH	8.0 (1.4)^a	−18.9 (0.6)^c	−25.1 (1.8)^b	27.4 (1.5)^b
Na₂CO₃	6.1 (6.4)^a	−17.3 (1.9)^d	−15.0 (1.8)^c	24.5 (1.7)^a
K₂CO₃	5.5 (1.9)^a	−18.5 (1.9)^d	−15.3 (3.2)^c	23.0 (1.7)^a

Note. Same superscripts in each column show no significant difference.