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Novel absorbance peak of gentisic acid following the oxidation reaction

Fig 6

Effects of AA on the absorption spectra of GA after the addition of NaOH with NaOCl·5H₂O.

Absorption spectra of 400 mg/L GA solutions containing several concentrations of AA (10, 50, 100, 200, and 300 mg/L) after the addition of NaOH with NaOCl·5H₂O.

doi: https://doi.org/10.1371/journal.pone.0232263.g006