a glass-stoppered, 25-mL conical flask是25ml的具塞锥形瓶，不是容量瓶
qingqingcao(qingqingcao) 发表:Standard solution— Transfer about 15 mg of glycerin and about 50 mg of tributyrin, both
accurately weighed, to a glass-stoppered, 25-mL conical flask; add 3 mL of Propionating
reagent; and heat at 75 for 30 minutes. Volatilize the reagents with the aid of a stream of
nitrogen at room temperature, add about 12 mL of chloroform, and mix. Dilute about 1 mL
of this mixture with chloroform to about 20 mL, and mix.
标准溶液——准确称取15mg甘油和约50mg三丁酸甘油酯到25ml容量瓶中，加入3ml丙酸试剂，75°加热30分钟，室温氮吹使之挥发干净，加入12ml氯仿，混匀。吸取1ml混合物到20ml容量瓶，氯仿定容，混匀。
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