This standard solution was accurately prepared in super-clean laboratory with highly pure metal copper and sub-packed in 20 ml ampoules.
本标准溶液以高纯金属铜片在超净实验室中准确配制并分装于20毫升安瓿中。
The excessive EDTA standard solution was titrated using copper sulfate with PAN as indicator so as to obtain nickel content.
以PAN为指示剂用硫酸铜标准溶液滴定过量的EDTA标准溶液，从而求得镍的含量。
The excessive EDTA standard solution was titrated using copper sulfate with PAN as indicator so as to obtain nickel content.
以PAN为指示剂用硫酸铜标准溶液滴定过量的EDTA标准溶液，从而求得镍的含量。
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