... 铜-康铜热＜电＞偶 copper-constantan thermocouple 铜-PAN指示剂；铜潘酚指示剂 copper-PAN indicator 绿矾 Copperas ...
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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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