【判断题】
在选择配位滴定的指示剂时，应注意指示剂-金属离子配合物与EDTA-金属离子配合物的稳定关系为 ，避免产生指示剂的封闭与僵化现象。
A. 对
B. 错
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答案
A
解析
暂无解析
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【判断题】
高效液相色谱法分析结束后，对于常用的Ｃ18烷基键合硅胶柱，应以纯甲醇代替流动相（特别是含有缓冲盐组分的流动相）继续走柱20min，以保护高压输液泵及色谱柱。
A. 对
B. 错
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