Simultaneous Determination of Trigonelline, Caffeine, Chlorogenic Acid and Their Related Compounds in Instant Coffee Samples by HPLC Using an Acidic Mobile Phase Containing Octanesulfonate

Kana ARAI; Hiroyuki TERASHIMA; Sen-ichi AIZAWA; Atsushi TAGA; Atsushi YAMAMOTO; Kaname TSUTSUMIUCHI; Shuji KODAMA

doi:10.2116/analsci.31.831

Original Papers

Simultaneous Determination of Trigonelline, Caffeine, Chlorogenic Acid and Their Related Compounds in Instant Coffee Samples by HPLC Using an Acidic Mobile Phase Containing Octanesulfonate

Kana ARAI, Hiroyuki TERASHIMA, Sen-ichi AIZAWA, Atsushi TAGA, Atsushi YAMAMOTO, Kaname TSUTSUMIUCHI, Shuji KODAMA

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Keywords: Instant coffee, trigonelline, caffeine, chlorogenic acid, HPLC

JOURNAL FREE ACCESS

2015 Volume 31 Issue 8 Pages 831-835

DOI https://doi.org/10.2116/analsci.31.831

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Abstract

In order to analyze trigonelline, caffeine, chlorogenic acid, and their related compounds simultaneously, an HPLC method using an InertSustain C18 column and a mobile phase containing octanesulfonate as an ion-pairing reagent under an acidic condition was developed. The optimum mobile phase conditions were determined to be 0.1% phosphoric acid, 4 mM octanesulfonate, and 15% methanol at 35°C. Using the proposed method, trigonelline, nicotinic acid, caffeine, theophylline, chlorogenic acid, and caffeic acid in ten instant coffee samples were analyzed. These analytes except for theophylline were detected in all samples. An increase in the caffeine content in instant coffee samples tended to decrease in both trigonelline and chlorogenic acid contents, and the trigonelline content was found to be correlated well with the chlorogenic acid content (R² = 0.887).

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