This part of the standard specifies the method for determining the moisture content of cigarettes and filter rods, which is applicable to these two products. According to the standard reference documents, the principle of the test is determined, that is, under the specified drying conditions, the ratio of the weight of the sample to the original weight is the moisture content. Required equipment includes Balance, electric air blowing dryer, etc. Sampling and sample preparation are carried out according to the corresponding standards, and then the test steps are carried out, including placing the sample in the oven for drying, chilling down and weighing, etc., and finally the result of moisture content is obtained.