1·The effects of organic acid with low molecular weight on fluorine adsorption included competitive adsorption of negative ion and stimulative effect because of acid environment.
低分子有机酸对氟吸附的影响一方面表现为阴离子的竞争作用，另一方面表现为酸性条件下的促进作用。
2·The different extraction methods are compared in the determination of negative ion surface active agent. The steps are simplified and the efficiency is improved.
通过对水中阴离子表面活性剂测定中不同萃取方法的比较，从而简化操作步骤，提高了工作效率。