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

Table 3

The precision and accuracy of the results obtained by the proposed spectrometric method; -number of independent measurements; ; SD: standard deviation.

HQ, μg·mL^−1		RSD, %	, %
Considered	Found ± SD
2.2	2.19 ± 0.05	2.31	99.39
5.5	5.51 ± 0.07	1.34	100.15
11	10.99 ± 0.29	2.60	99.88