当在面罩内可闻出溶剂气味时，表明所用的吸附剂已失去作用，应及时更换。
When one can smell out the odor of solvent, it shows the adsorbent is disabled, and it needs to be replaced immediately.
这些溶剂在活性炭上的冲洗作用很不同于在极性吸附剂上的冲洗作用。
These solvents give very different eluting actions on active carbon as compared with the elution on polar adsorbents.
这些溶剂在活性炭上的冲洗作用很不同于在极性吸附剂上的冲洗作用。
These solvents give very different eluting actions on active carbon as compared with the elution on polar adsorbents.
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