When you use this ERM, please carefully break open the ampoule at the neck and pipette 5ml from the ampoule into 100ml volumetric flask and bring to volume by pre-distilled carbon tetrachloride.

• 临用时割开安瓿，用5毫升干燥洁净移液管从安瓿中准确移取浓样5毫升于100毫升容量瓶中，用经重蒸馏等纯化处理过的四氯化碳稀释定容。