Patent ID: 8534297
Filing Date: 2013-09-17
Classification: G01N

Abstract:
1. A method of testing moisture retention of tobacco, comprising: Step One of pretreating samples in which a cut tobacco sample is placed into a thermo-hygrostat for 48 hours to 72 hours to reach equilibrium for use; Step Two in which a predetermined amount of the cut tobacco sample to be tested is weighed, weight changes against time t of the cut tobacco sample is tested at a predetermined temperature in a dry environment, a dry basis weight of the cut tobacco sample is measured after reaching a predetermined equilibrium moisture content, and based on the measured dry basis weight as well as a curve showing the weight changes against time of the cut tobacco sample, a dry basis moisture content Mt of the cut tobacco sample at a time point t is calculated for drawing a curve showing changes in the dry basis moisture content Mt against the time t; Step Three in which, during a time period when the dry basis moisture content satisfies 0.4<Mt−Me/M Step Four in which a cut tobacco sample with humectants added and a blank sample for comparison are respectively subjected to the above testing to obtain a moisture-desorption rate constant k in the dry environment, and the moisture retention of the tobacco humectant is determined according to a value of the k.