食品科学 ›› 2009, Vol. 30 ›› Issue (22): 268-271.doi: 10.7506/spkx1002-6300-200922062

• 分析检测 • 上一篇    下一篇

RP -HPLC 测定果汁类饮料中抗坏血酸含量

张志清,白 琦   

  1. 四川农业大学食品学院
  • 收稿日期:2008-12-09 出版日期:2009-11-15 发布日期:2010-12-29
  • 通讯作者: 张志清 E-mail:zqzhang721@163.com
  • 基金资助:

    四川省教育厅重点项目(2005A018);四川农业大学青年创新基金项目(5304)

Determination of Ascorbic Acid in Juice by RP-HPLC

ZHANG Zhi-qing,BAI Qi   

  1. College of Food Science, Sichuan Agricultural University, Ya'an 625014, China
  • Received:2008-12-09 Online:2009-11-15 Published:2010-12-29
  • Contact: ZHANG Zhi-qing E-mail:zqzhang721@163.com

摘要:

目的:建立果汁类饮料中抗坏血酸(VC)含量的HPLC 检测方法。方法:采用Luna C18(2)色谱柱(150mm× 4.6mm,5μm);流动相:0.1% 草酸溶液,流速:1ml /min;检测波长:245nm,柱温:30℃。结果:峰面积(Y)与浓度(X)在3.952~79.04μg/ml 范围内线性关系良好(r=0.9999),3倍和10倍信噪比最小检出限为0.0007μg/ml和0.0022μg/ml,平均加标回收率(n=5)为108.3%。实验精密度(RSD)为0.54%,重复性实验RSD 为0.28%,样品8h 内检测结果稳定,日间测定RSD 为5.59%。结论:该方法具有准确、简便、快速的特点,可用于果汁中VC含量的快速检测。

关键词: 反相高效液相色谱, 抗坏血酸, 果汁饮料, 含量测定

Abstract:

Objective: To develop a convenient and quick measurement method for ascorbic acid in juice. Methods: A reverse phase high performance liquid chromatography (RP-HPLC) method was established to determine the concentration of ascorbic acid in juice. The RP-HPLC was composed of SPD-10AVP as the UV-detector, Luna C18(2) column (150 mm × 4.6 mm, 5 μm) as the solid phase, 0.1% oxalic acid solution as the mobile phase with flow rate of 1.0 ml/min, UV detection wavelength at 245 nm and 30 ℃ of column oven temperature. Results: The good linear was in the range of 3.952-79.04 μg/ml (r = 0.9999) with the detection limit of 0.0007 and 0.0022 μg/ml according to 3× and 10× noise signal, respectively. The average recovery rate was 108.3% (n = 5). The RSD was 0.54 and 0.28% in precision and reproducibility tests, respectively. The determination was stable in 8 h (RSD = 5.59%). Conclusion: This RP-HPLC method is a suitable measurement method for ascorbic acid in juice due to its accuracy, convenience and quickness.

Key words: RP-HPLC, ascorbic acid, juice, determination

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