四氢呋喃是一种常用试剂,长期来上海地区只生产化学纯规格,其杂质项目中并不控制水分,这样给部分对质量要求高的用户增加了困难。如某些用户反映:“使用化学纯四氢呋喃,还要用金属钠脱水,既麻 Tetrahydrofuran is a commonly used reagent. For a long time, only pure chemical specifications have been produced in Shanghai. The impurities in the project do not control the water content, thus adding some difficulties to users with high quality requirements. As some users reflect: "The use of chemical pure tetrahydrofuran, but also with sodium dehydration, both Ma