国内外典型茄衣烟叶常规化学成分和中性致香物质关键性差异指标研究
Study on the key differences indexes of conventional chemical constituents and neutral aromatic substances in domestic and foreign typical wrapper tobacco leaves
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摘要: 为了解国内外典型茄衣烟叶关键品质指标差异,测定了中国、巴西、多米尼加、印度尼西亚这4个国家共40份茄衣烟叶样品中的常规化学成分和中性致香物质,通过偏最小二乘判别分析(PLS-DA)法和Pearson相关性分析法进行关键性差异指标筛选及相关性分析。结果表明:国内茄衣烟叶总糖和还原糖质量分数显著高于国外茄衣烟叶,烟碱质量分数显著高于巴西和印度尼西亚茄衣烟叶,氮碱比显著低于巴西和印度尼西亚茄衣烟叶,钾质量分数显著低于巴西和多米尼加茄衣烟叶;国内茄衣烟叶中性致香物质总含量和新植二烯含量高于国外茄衣烟叶,苯丙氨酸类降解产物含量与巴西、多米尼加和印度尼西亚茄衣烟叶均较为接近,棕色化反应产物含量显著高于国外茄衣烟叶;国内外茄衣烟叶关键性差异指标共有16种,其中β-大马酮含量、愈创木酚含量等11种指标表现为国内茄衣烟叶中数值相对较高,苯甲醛含量、总氮质量分数、氮碱比等5种指标表现为国外茄衣烟叶中数值相对较高;16种指标中总氮质量分数和氮碱比与二氢猕猴桃内酯含量、2-乙酰基吡咯含量和苯甲醛含量均呈极显著正相关,与巨豆三烯酮2含量、β-大马酮含量均呈显著或极显著负相关,而总糖、还原糖和烟碱质量分数与上述中性致香物质含量之间的关系则均相反。
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关键词:
- 茄衣烟叶 /
- 常规化学成分 /
- 中性致香物质 /
- 偏最小二法乘判别分析 /
- 相关性分析
Abstract: To understand the differences in key quality indicators of domestic and foreign typical wrapper tobacco leaves, we determined the conventional chemical components and neutral aroma compounds in 40 samples of wrapper tobacco leaves from four countries: China, Brazil, Dominican Republic, and Indonesia. Key differential indicators were screened and correlated using partial least squares discriminant analysis (PLS-DA) and Pearson Correlation Analysis. The results indicated that: the total sugar and reducing sugar mass fractions of domestic wrapper tobacco leaves were significantly higher than those of foreign wrapper tobacco leaves, the nicotine mass fraction was significantly higher than that of Brazilian and Indonesian tobacco leaves, the nitrogen alkali ratio was significantly lower than that of Brazilian and Indonesian tobacco leaves, the potassium mass fraction was significantly lower than that of tobacco leaves from Brazil and the Dominican Republic. The total amount of neutral aroma compounds and the content of new phytodienes in domestic wrapper tobacco leaves were higher than those in foreign wrapper tobacco leaves, the content of phenylalanine degradation products was similar to that of tobacco leaves from Brazil, the Dominican Republic, and Indonesia, the content of browning reaction products was significantly higher than that of foreign wrapper tobacco leaves. There were a total of 16 different indicators of differences in wrapper tobacco leaves both domestically and internationally. Eleven indicators, including the content of the β-damascus ketone, guaiacol showed relatively high values in domestic wrapper tobacco leaves. The five indicators, including benzaldehyde content, total nitrogen mass fraction, and nitrogen alkali ratio, showed relatively high values in foreign wrapper tobacco leaves. Among the 16 differential indicators, the total nitrogen mass fraction and nitrogen to base ratio were highly significantly positively correlated with the content of dihydrokiwifruit internal fat, 2-acetylpyrrole, and benzaldehyde, and extremely significant negative correlation between the content of damarone and β-damascus ketone, the mass fractions of total sugar, reducing sugar, and nicotine had an inverse relationship with the neutral aroma substances mentioned above. -
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