食品科学 ›› 2020, Vol. 41 ›› Issue (10): 180-184.doi: 10.7506/spkx1002-6630-20190508-063

• 成分分析 • 上一篇    下一篇

多阶导数紫外光谱法快速测定生物转化液中的肉桂醇、肉桂醛和肉桂酸

江艳艳,粟桂娇,马丽,黄秋容,于唱,李丽丽   

  1. (1.广西大学化学化工学院,广西 南宁 530004;2.广西大学生命科学与技术学院,广西 南宁 530004)
  • 出版日期:2020-05-25 发布日期:2020-05-15
  • 基金资助:
    国家自然科学基金青年科学基金项目(21502027);广西自然科学基金项目(2016GXNSFAA380304)

Rapid Determination of Cinnamyl Alcohol, Cinnamaldehyde and Cinnamic Acid in Bioconversion Products by Multiorder Derivative Ultraviolet Spectrometry

JIANG Yanyan, SU Guijiao, MA Li, HUANG Qiurong, YU Chang, LI Lili   

  1. (1. School of Chemistry & Chemical Engineering, Guangxi University, Nanning 530004, China; 2. School of Life Science & Technology, Guangxi University, Nanning 530004, China)
  • Online:2020-05-25 Published:2020-05-15

摘要: 为高效筛选转化肉桂醛为天然肉桂醇的微生物菌株,建立直接、快速测定生物转化液中的肉桂醇、肉桂醛和肉桂酸含量的多阶导数紫外光谱法。对3 个组分的紫外吸收光谱进行二阶或三阶导数处理,选择各组分合适的检测波长;在选定波长下建立各组分吸收光谱的导数值对质量浓度的工作曲线。结果表明:肉桂醛和肉桂酸分别在320 nm和306 nm波长处的二阶导数值与其质量浓度分别在0.52~9.27 mg/L和0.51~9.24 mg/L范围内有良好的线性关系,平均回收率分别为103.3%和104.1%,相对标准偏差(relative standard deviation,RSD)为4.1%和2.1%;肉桂醇在256 nm波长处的三阶导数值与其质量浓度在0.55~5.47 mg/L范围内有良好的线性关系,平均回收率为98.0%,RSD为3.5%。利用该方法,样品中各组分不需提取分离即可直接稀释测定,可用于微生物转化肉桂醛制备肉桂醇反应实验菌株的快速高效筛选。

关键词: 多阶导数紫外光谱法, 肉桂醛, 肉桂醇, 肉桂酸, 生物转化

Abstract: To efficiently select microbial strains capable of biotransforming cinnamaldehyde into cinnamyl alcohol, a new method for the rapid determination of cinnamyl alcohol, cinnamaldehyde and cinnamic acid in the biotransformation products of cinnamaldehyde was established using multi-order derivative ultraviolet (UV) spectrometry. Based on their second (for cinnamaldehyde and cinnamic acid) or third (for cinnamyl alcohol) order derivative UV absorption spectra, 320, 306 and 256 nm were selected as suitable wavelengths for determination of cinnamaldehyde, cinnamic acid and cinnamyl alcohol, respectively. Good linearity was observed in the concentration range of 0.52–9.27, 0.51–9.24 and 0.55–5.47 mg/L for the three compounds, respectively. Their average recoveries were 103.3%, 104.1% and 98.0% with relative standard deviations (RSDs) of 4.1%, 2.1% and 3.5% (n = 3), respectively. The measurement could be carried out on samples after dilution without extraction or separation, which could be used for rapid screening for strains capable of biotransforming cinnamaldehyde into cinnamyl alcohol.

Key words: multi-order derivative ultraviolet spectrometry, cinnamaldehyde, cinnamyl alcohol, cinnamic acid, biotransformation

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