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Simultaneous Determination of Organic Acids and Vitamin C in Jujube Fruits by HPLC

MA Qianqian1, WU Cuiyun1,2,*, PU Xiaoqiu1 ,WANG De1, SUN Yaqiang1   

  1. 1. Engineering Laboratory of Characteristic Fruit Tree Production in Southern Xinjiang, Xinjiang Production and Construction Corps,
    College of Plant Science, Tarim University, Alar 843300, China; 2. Xinjiang Production and Construction Corps Key Laboratory of
    Protection and Utilization of Biological Resources in Tarim Basin, Tarim University, Alar 843300, China
  • Online:2016-07-25 Published:2016-07-26
  • Contact: WU Cuiyun

Abstract:

Objective: This study aimed to establish and validate a high performance liquid chromatographic (HPLC) method
for the fast simultaneous determination of organic acids and vitamin C (VC) in jujube fruits. Methods: The analytes in
samples were extracted ultrasonically in a water bath, centrifugated and purified by membrane filtration for analysis by
HPLC with diode-array detection (DAD). The chromatographic column used was Inertsil ODS-3 (4.6 mm × 250 mm, 5 μm).
The separation was performed using 0.04 mol/L KH2PO4 (pH 2.40) as mobile phase at 0.5 mL/min flow rate by isocratic
elution. The column temperature and detection wavelength were set as 30 ℃ and 210 nm, respectively. Results: Under
these chromatographic conditions, 7 organic acids and VC could be successfully separated in 30 minutes. The coefficients
of determination (R2) of the standard calibration curves of the analyzed compounds were all above 0.998 9 and the precision
expressed as relative standard deviations were between 0.98% and 4.77% (n = 5) and the repeatability RSDs were in the
range of 0.88% to 2.19% (n = 5). The mean recovery rates of seven organic acids and vitamin C were in the range of 91.35%
to 105.74%. Conclusion: This method is an accurate, rapid, and applicable method to determine organic acids and vitamin C
in jujube fruits.

Key words: high performance liquid chromatography (HPLC), jujube, organic acid, vitamin C

CLC Number: