Method of testing moisture retention of tobacco
US8534297B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2010 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Dec 16, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N5/045
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides a method of testing moisture retention of tobacco in which dynamic rules on moisture desorption of the cut tobacco in a dry environment are investigated by using a dynamic vapor sorption system and has found that a dry basis moisture content at an earlier stage of moisture desorption of the cut tobacco has a preferred linear correlation with a square root of time. A linear fitting for t0.5 is made by using values of a dry basis moisture content Mt at a time point t, and a rate constant k is obtained from a slop of the obtained straight line and used as a reference of testing the moisture retention of tobacco. The method can also be used to investigate the moisture retention of tobacco and filter humectants of cigarettes. In comparison with the conventional method, the method is convenient and applicable, and has a short testing period, a high degree of automation, preferred accuracy and preferred reproducibility, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.