A Derivative Spectrometric Method for Hydroquinone Determination in the Presence of Kojic Acid, Glycolic Acid, and Ascorbic Acid

Table 1

Analytical parameters of the first-order derivative spectrometric method for the indirect HQ determination.

Parameter	Value
Linear range, μg·mL^−1	0.22–22
Intercept,	0.0018
Intercept standard deviation,	0.00032
Slope,	0.0031
Slope standard deviation,	0.00003
Determination coefficient,	0.9994
LOD, μg·mL^−1	0.07
LOQ, μg·mL^−1	0.22