Factors affecting the composition of plant ashes, with special reference to tobacco

Oswald Digby Roberts
1918 The Analyst  
THE plant under consideration in this investigation is tobacco; it was selected as representing a material of economic value in which the composition of the ash ifil specially important on account of its influence on the burning quality of the tobacco and the relatively large percentage of ash which tobacco affords. The mineral constituents of a plant are urrually recorded either LEI percentages of the original dried plant or as perclentages of the ash. The latter course i8 generally adopted,
more » ... enerally adopted, but should the former result be required, the figure is usually recalculated from a consideration of the peroentage of the ash; consequently the importance of obtaining a correct ash figure, upon which all these calculations are based, is obvious. The incineration of a plant to produce a satisfactory ash is not an eagy oparation. In many cases the temperature of combustion necessary to produce m ash free from carbon not only endangers loss through volatilisation, but causes the ash to fuse, so that small pazticles of carbon are retained and resist combustion ; hence.
doi:10.1039/an9184300254 fatcat:i2qdqtj2uja2noilvij5fu6uga