oa Agrochemophysica - The relationship between colour and some physical and chemical properties of flue-cured tobacco

Volume 5, Issue 4
  • ISSN : 0302-7112



The South African flue-cured tobacco grade OR/5 was divided into five colour groups and analysed for some physical and chemical properties. The purpose of this study was to determine the relationship between colour and the chemical and physical properties. These analyses were carried out to determine which of the characteristics of tobacco leaf that cannot be seen by simple inspection could be correlated with colour. Total reducing substances, reducing sugars and polyphenols decreased as colour became darker. Filling power, total nitrogen, protein nitrogen, soluble nitrogen, total alkaloids, volatile bases, petroleum-ether extracts and total ash increased as the colour intensity increased. The ratios of some of the chemical constituents were found to be correlated with colour within this grade. Percentage lamina, moisture equilibrium, combustibility and cairotenoid content were unrelated to colour.

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