LC

Samples

Citric acid , Tartaric acid , Malonic acid , Succinic acid , Lactic acid , Acetic acid , Gallic acid , Propionic acid , Phthalic acid , Phenoxyacetic acid , m-Hydroxybenzoic acid , p-Hydroxybenzoic acid , Vanilic acid , Caffeic acid , Benzoic acid , o-Hydroxybenzoic acid

Applications

Elution position of the aromatic organic acid

Column

ULTRON PS-80H

Column Size

300 mm L × 8.0 mm I.D.

Mobile phase

HClO4aq. (pH 2.1)/CH3CN = 90/10

Frow rate

1.0 mL/min

Column temp.

60°C

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LC

Samples

Arbutin , Hydroquinone , Gallic acid

Applications

Arbutin in the Bearberry Leaf end

Column

STR ODS-II

Column Size

150 mm L × 4.6 mm I.D.

Mobile phase

100 mM Phosphoric acid buffer (pH 2.1)/CH3OH = 40/1

Frow rate

0.9 mL/min

Column temp.

35°C

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