湖北农业科学 ›› 2020, Vol. 59 ›› Issue (18): 116-120.doi: 10.14088/j.cnki.issn0439-8114.2020.18.023

• 检测分析 • 上一篇    下一篇

紫外分光光度法测定烤烟挥发油溶液浓度

王柯涵1,2, 向欢1,3, 杨懿德4, 张永辉5, 曾淑华1, 杨民烽6, 郭仕平6, 刘雷1   

  1. 1.四川农业大学农学院,成都 611130;
    2.四川省什邡市发展改革和科技局,四川 德阳 618400;
    3.四川省烟草公司德阳市公司,四川 德阳 618400;
    4.四川省烟草公司宜宾市公司,四川 宜宾 644000;
    5.四川省烟草公司泸州市公司,四川 泸州 646000;
    6.四川省烟草公司,成都 610041
  • 收稿日期:2019-11-20 发布日期:2020-11-05
  • 通讯作者: 刘 雷(1972-),男,四川遂宁人,教授,主要从事烟叶调制与化学品质研究,(电话)17713645825(电子信箱)srars@qq.com。
  • 作者简介:王柯涵(1989-),男,四川什邡人,硕士,主要从事烟叶化学品质研究,(电话)13018243066(电子信箱)294137350@qq.com;
  • 基金资助:
    宜宾市烟草公司科技项目(201751150020074); 泸州市烟草公司科技项目[川烟科(2018)27号]

Determination of the concentration of flue-cured tobacco volatile oils by UV-spectrophotography

WANG Ke-han1,2, XIANG Huan1,3, YANG Yi-de4, ZHANG Yong-hui5, ZENG Shu-hua1, YANG Min-feng6, GUO Shi-ping6, LIU Lei1   

  1. 1. Agricultural College of Sichuan Agricultural University, Chengdu 611130, China;
    2. Shifang Bureau of Development Reform and Sci-tech, Deyang 618400, Sichuan, China;
    3. Sichuan Tobacco Corporation Deyang Branch, Deyang 618400, Sichuan, China;
    4. Sichuan Tobacco Corporation Yibin Branch, Yibin 644000, Sichuan, China;
    5. Sichuan Tobacco Corporation Luzhou Branch, Luzhou 646000, Sichuan, China;
    6. Sichuan Provincial Tobacco Company, Chengdu 610041, China
  • Received:2019-11-20 Published:2020-11-05

摘要: 为建立利用紫外分光光度法测定烤烟挥发油溶液浓度方法,先用同时蒸馏萃取方法得到烤烟挥发油,再用二氯甲烷将其稀释成梯度溶液,紫外分光光度扫描,并确定工作波长,以此建立烤烟挥发油浓度与其紫外吸光度间的线性回归方程。结果表明,烤烟挥发油的紫外光吸收带在225~245 nm,239 nm最适合作为测定烤烟叶挥发油溶液浓度的工作波长,线性回归方程为y = 0.250 1 x + 0.039 3,R2=0.999 3,且有很好吸光度重复性(RSD<0.5%);所得线性工作曲线的LOD为0.153 g/L,LOQ为0.464 g/L。

关键词: 烤烟, 挥发油, 紫外光, 分光光度法, 定量

Abstract: To determining the concentration of volatile oils solution extracted from flue-cured tobacco leaves, a method based on UV spectrophotometry was researched. Volatile oils were extracted by simultaneous distillation and diluted with dicholormethane to prepare a set of gradient solutions. Each solution was scanned by UV spectrophotomet. The best working wavelength was selected to establish linear regression equation between the concentration of volatile oil and its ultraviolet absorbance. Results showed that the volatile oils had a large absorption spectrum between 225~245 nm. The best analysis wavelength was 239 nm, the linear relationship was y =0.250 1x + 0.039 3, R2=0.999 3. Its relative error of was less than 0.5%, the limit of detection (LOD) and the limit of quantification (LOQ) of the working curve were 0.153 g/L and 0.464 g/L separately.

Key words: flue-cured tobacco, volatile oils, ultraviolet light, spectrophotography, determination

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