（1）色泽鉴别进行豆腐色泽的感官鉴别时，应取样品一块在散射光线下直接观察。良质豆腐呈均匀的乳白色或淡黄色，稍有光泽。劣质豆腐呈深灰色、深黄色或者红褐色。（2）组织状态鉴别进行豆腐组织状态的鉴别时，应先直接看其外部情况，然后用刀切成几块再仔细观察切口处，最后 (1) color identification Tofu sensory identification, should take a sample of the direct observation under scattered light. Good quality tofu was milky white or light yellow, slightly shiny. Poor quality tofu dark gray, dark yellow or reddish brown. (2) the identification of tissue state Tofu tissue state identification, you should first look directly at the external conditions, and then cut into several pieces with a knife and then carefully observe the incision at the end