1·Chemistry experiment is based on the elementary knowledge, especially checking the usage of suction pipet and buret.
化学实验重在基础，特别是考察移液管和滴定管的使用；
2·When you use this ERM, please carefully break open the ampoule at the neck and pipet 10 ml from the ampule into 250 ml volumetric flask and bring to volume by laboratory-pure water.
临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10 毫升于250 毫升容量瓶中，用纯水定容。
3·When you use this ERM, please carefully break open the ampoule at the neck and pipet 10 ml from the ampule into 250 ml volumetric flask and bring to volume by 1%HNO3 or 1%HCl solution.
临用时割开安瓿，用10毫升干燥洁净移液管从安瓿中准确移取浓样10 毫升于250 毫升容量瓶中，用1%硝酸或1%盐酸溶液定容。