초록

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Abstract ▼ AI-Helper

Non-volatile organic acids, such as lactic, oxalic, fumaric, succinic, maleic and citric acid were analyzed by capillary gas chrimatograph. Each organic acid was esterified with RF₃/Methanol and the esterification yields were analyzed with changing the reaction temperature, time, the amount of BF₃/...

Non-volatile organic acids, such as lactic, oxalic, fumaric, succinic, maleic and citric acid were analyzed by capillary gas chrimatograph. Each organic acid was esterified with RF₃/Methanol and the esterification yields were analyzed with changing the reaction temperature, time, the amount of BF₃/Methanol and the content of water. The best esterifying yields were obtained by heating at 60℃ with 2ml of 14% BF₃/Methanol for 25 min. In addition, it was observed that even a small amount of moisture affected the esterifying ratio significantly. Close relation between esterifying ratio and the amounts of organic acids was found and their calibration curves had been long linear range with high correlation coefficients.