大豆粉中水分含量测定的研究

[目的]优化直接干燥法测定大豆粉中水分含量的条件,使试验结果更快捷、更准确。[方法]依据GB 5009.3—2010《食品中水分的测定》直接干燥法测定大豆粉中水分含量,根据测定值与指定值计算出Z值,进行能力验证考核,分析比较该试验的最优条件。[结果]考核样大豆粉水分含量指定值为6.81%,标准偏差为0.12%,而通过试验得到的水分平均值为6.92%,Z值0.91。试验最优条件为称量瓶质量小,烘烤时间3 h,称样的质量3 g左右。[结论]该研究可为大豆粉中水分含量的测定提供参考。

Det erm ination of Moisture in Soybe an Powder

Objective] The aim was to find the optimum conditions for measuring moisture content in soybean powder by direct drying meth-od,which makes the test result more rapid and accurate .[ Method] According to direct drying method of GB 5009.3—2010 Determination of Moisture in Food, moisture content in soybean powder was determined.Z value was calculated based on the measured value and specified val-ue, the optimal conditions were analyzed.[Result] The specified value of moisture content in soybean powder was 6.81%, standard deviation was 0.12%, the obtain moisture mean through experiment was 6.92%, Z value ratio was 0.91.The optimal conditions were:choosing small quality weighting bottle, baking 3 h, quality of sample about 3 g.[ Conclusion] The study can provide reference for determination of moisture in soybean powder.