微波测定小麦水分的研究

Using microwave for wheat moisture content determination

对不同功率、微波时间和样品量与小麦水分的关系进行了分析,找出微波测定小麦水分最优条件出现的范围。并以此为基础,根据Box-Behnken试验设计原理,采用3因素3水平响应面分析方法,建立多项式回归方程的预测模型,确定微波测定小麦水分的最优条件。试验表明,最优条件为微波功率680W,微波时间10.8min,样品量2.63g,此时测定的小麦水分为11.52%,与GB/T 5497—1985测定结果相近。

The relationship between microwave power, time, sample volume and wheat moisture content were analyzed for determine the range of optimum conditions of using microwave to define wheat moisture content. As the basis of the experimental design principles of Box-Behnken, three factors and three levels of response surface analysis methods were defined and established the polynomial regression equation forecasting model to determine the optimum conditions of microwave testing for wheat moisture content determination. Result showed that the optimum experiment conditions for the microwave power is 680 W, microwave time was 10.8 min, sample volume of 2.63 g, the wheat moisture content of sample tested at this parameters is 11.52%,which got a close measurement results with the GB/T 5497-1985.