Seliwanoff试剂是常用于鉴别醛糖和酮糖的特征试剂,在加热条件下,酮糖与Seliwanoff试剂反应很快显色,己酮糖为鲜红色,戊酮糖显蓝到绿色,而己醛糖与Seliwanoff试剂经稍长时间作用后才显示出浅黄色或淡玫瑰红色。在相同条件下,果糖显色比葡萄糖要快十几倍。自然界的糖类化合物多由五碳糖、六碳糖构成,所以,Seliwanoff反应主要用于戊糖、己 Seliwanoff reagents are commonly used to characterize aldoses and ketoses. Under heating conditions, ketones react rapidly with Seliwanoff reagent, ketogenic sugars are bright red, ketopentose is blue to green, and aldohexose It shows a light yellow or light rose-red color with the Seliwanoff Reagent for a slightly longer time. Under the same conditions, fructose color faster than glucose ten times. Natural carbohydrate compounds mostly by the five-carbon sugar, six carbon sugar composition, therefore, Seliwanoff reaction is mainly used for pentose, have