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85问答库 > 普通硅胶干燥剂（不是变色的）有没有失效怎么判断？谢谢大家。

普通硅胶干燥剂（不是变色的）有没有失效怎么判断？谢谢大家。

2025-02-19 04:16:46

推荐回答（3个）

回答1：

用静态吸附法测静态吸附值，静态吸附值小于20就失效了，将硅胶干燥剂放在底部盛水的玻璃干燥器内，24小时后称重，重量差就是吸附值，干燥剂如有效就会吸收水份，失效了就吸得少或不吸。

回答2：

失效后就变色了，普通白色的失效后应是有点泛红

回答3：

i我也想知道!

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