道真县初烤烟叶总挥发酸和挥发碱及石油醚提取物含量分析

发布时间:2019-08-24 来源: 感悟爱情 点击:


  摘 要: 分析了贵州省道真县烤烟总挥发酸、总挥发碱和石油醚提取物总量特征及在不同等级的差异。结果表明,道真县烤烟总挥发酸含量较低,变幅为0.06%~0.10%,平均值为0.08%,变异系数为14.41%;总挥发碱含量较高,变幅为0.26%~0.66%,平均值为0.40%,变异系数为29.82%;烤烟石油醚提取物含量较高,变幅为5.28%~7.56%,平均值为6.38%,变异系数为12.43%。总挥发酸含量以中部烟叶相对较高,总挥发碱和石油醚提取物含量以上部烟叶相对较高。
  关键词:烤烟;总挥发酸;总挥发碱;石油醚提取物;道真县
  中图分类号:S572 文献标识码:A DOI编码:10.3969/j.issn.1006-6500.2013.09.022
  Analysis on the Contents of Total Volatile Acids and Volatile Bases and Petroleum Ether Extract of Flue-cured Tobacco Leaves Grown in Daozhen County
  XIA Ji-ya1,2, DENG Xiao-hua1, DENG Dai-hong2, ZHU Dao-kang2, LEI Jin-xue2, YANG Li-li1
  (1. Hunan Agricultural University, Changsha ,Hunan 410128, China;2. Daozhen County Branch of Guizhou Province Tobacco Companies, Daozhen Guizhou 563500, China)
  Abstract: The total volatile acids, total volatile bases and petroleum ether extract of flue-cured tobacco leaves in Daozhen county of Guizhou province and their differences at different grades were analyzed. The results showed that the contents of total volatile acids of flue-cured tobacco leaves in Daozhen county was lower , ranged from 0.06% to 0.10%, averaged of 0.08% and variation coefficient of 14.41%. The contents of total volatile bases was relatively high, ranged from 0.26% to 0.66%,averaged of 0.40%,raviation coefficient of 29.82%. The contents of petroleum ether extract of flue-cured tobacco leaves was higher, ranged from 5.28%~7.56%,averaged of 6.38%,raviation coefficient of 12.43%. The contents of total volatile acids of central leaves is relatively higher, the contents of total volatile bases and petroleum ether extract of upper leaves was relatively higher.
  Key words: flue-cured tobacco;total volatile acids; total volatile bases;petroleum ether extract;Daozhen county
  烟草中挥发酸和挥发碱含量与烟草的内在质量密切相关,对调节烟气酸碱平衡具有重要的作用[1-3];石油醚提取物被认为是形成烟草香味的重要来源,常作为衡量烟叶中致香物质的一项重要指标[4]。烤烟总挥发酸、总挥发碱和石油醚提取物的研究一直倍受关注[5-12],但对贵州省道真县初烤烟叶的研究报道较少。鉴此,笔者对道真县初烤烟叶总挥发酸、总挥发碱和石油醚提取物含量进行分析,旨在为合理使用道真县烟叶原料提供参考。
  1 材料和方法
  1.1 材 料
  试验材料为道真县2003—2011年初烤烟叶样品24个。烤烟等级分别为B2F(上橘二)、C2F(中橘二)、C3F(中橘三)、X2F(下橘二),品种为K326、云烟87。
  1.2 方 法
  挥发酸和挥发碱采用连续流动法测定[13],石油醚提取物总量采用索氏提取-称重法测定[14]。试验数据处理采用Excel2007和SPSS17.0统计分析软件完成。多重比较采用Duncan’ multiple rang test法。图1~3中英文大写字母表示1%差异显著性,英文小写字母表示5%差异显著性。
  2 结果与分析
  2.1 基本统计特征及变异分析
  对道真县烤烟的总挥发酸、总挥发碱和石油醚提取物总量的基本统计特征值见表1。烤烟挥发酸含量适宜时烟气吸味醇和、香气量大,道真县烤烟总挥发酸含量平均值为0.08%,低于全国平均值[6]。烟草中挥发碱含量过高,会使烟气产生较大的刺激性,而其含量过低,则烟气平淡,道真县烤烟总挥发碱含量为0.40%,是比较高的[7]。烤烟石油醚提取物常作为评价烟草香味的重要指标之一,一般要求含量不低于5.00 %,以高于7.00%为最佳[10],道真县烤烟石油醚提取物总量为6.38%,高于全国平均值[11]。

相关热词搜索:发酸 烟叶 提取物 挥发 含量

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