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Chromatograph for the determination of thymol and carvacrol. Conditions: extractant solvent: 1-undecanol (20.0 µL); disperser solvent = acetone (0.50 mL); pH 7.0; %NaCl = 7.0%; ultrasound duration time = 10.0 min; centrifuging duration time = 7.5 min.
