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人教版高中化学新教材选修五第三章在谈及醛基检验时,沿用了旧教材的2种检验方法,即银氨溶液和新制氢氧化铜检验,其中关于新制氢氧化铜的检验,教材上是这样描述的:“在试管里加入10%的NaOH溶液2mL,滴入2%的CuSO_4溶液4-6滴,得到新制氢氧化铜,振荡均匀后加入乙醛溶液0.5mL,加热。观察到生成红色沉淀Cu_2O,可以用来检验醛基。”而在高中生物教材中,在“探究生物组织中还原糖”这一内容中,提出含有醛基的还原糖的检验方法
People’s Education Edition of high school chemistry new textbook elective fifth chapter when talking about aldehyde-based test, the old teaching materials used in the two test methods, namely silver ammonia solution and the new copper hydroxide test, which on the new copper hydroxide Test, the textbook is described as: “in the test tube by adding 10% NaOH solution 2mL, dropping 2% of the CuSO4 solution 4-6 drops to obtain a new copper hydroxide, after shaking evenly added acetaldehyde solution 0.5mL , Heating was observed to produce a red precipitate Cu_2O, can be used to test aldehyde. ”In high school biology textbook, in the “ to explore the reducing sugar in the biological tissue ”this content, proposed reducing aldehyde containing aldehyde Testing method