肽餐混合料混合均匀度的检测

摘要

The article focused on the detection of mixing homogeneity of diet-alternative solid drink mixture containing oligopeptide.The stability of methyl violet,brilliant blue and sodium copper chlorophyllin and their interaction with solid drink powder were tested.The mixing homogeneity of the powder in mixer in different time was examined by methyl violet tracing and chloride electrode detection.The results indicated that the stability of sodium copper chlorophyllin did not satisfy the requirement.On the other hand,brilliant blue had an interaction with the sample.Methyl violet performed better stability and had no interaction with the sample material,with the coefficient of variation ranging from 2％ to 4％,thus implied the best detecting effect.Chloride electrode detection gained the coefficient of variation from 4％ to 7％,which was higher than that of methyl violet tracing,but the former would not pollute the drink.Methyl violet tracing was limited to use only in the process simulation for the sake of its toxicity.However,chloride electrode detection could be used in real process testing for its advantage of without pollution for the sample.%探讨了肽餐粉体混合均匀度的测定方法,分别尝试了以叶绿素铜钠、亮蓝、甲基紫3种色素作为示踪物测试自身稳定性及与物料成分间的干扰性,并以甲基紫色素示踪法和氯离子电极检测法测定了不同混合时间下混合机的样品的混合均匀度.结果表明,叶绿素铜钠作为指示剂自身稳定性不足,不能满足检测要求;亮蓝作为指示剂,与物料存在相互作用,会导致变异系数升高;甲基紫作为指示剂,自身稳定性良好,与物料也不存在相互作用,其变异系数在2％～4％,是测定肽餐物料混合均匀度较好的指示剂.使用氯离子电极检测法对肽餐混合粉末进行测定,其变异系数在4％～7％,稍大于甲基紫法,且氯离子电极检测法具有不破坏样品的优点,使得该法在工艺模拟条件下可以与甲基紫法互作补充.甲基紫法由于其自身性质,仅限于工艺模拟条件下使用;氯离子电极检测法则可用于实际工艺条件下的肽餐物料混合均匀度测定.