Traces of sulfate ions in etching solution for aluminum foil have been determined by turbidimetry in presence of cation surface activator-hexadecyl trimethyl ammonium bromide (CTMAB).
在阳离子表面活性剂——十六烷基三甲基溴化铵（CTMAB）的存在下，用比浊法对铝箔蚀腐液中微量硫酸根离子进行测定。
Sucrose ester is a good new-type surface activator widely used in food, medicine, detergent and cosmetics industries.
糖酯是一种优良的新型表面活性剂，被广泛地应用于食品、医药、洗涤剂、化妆品等工业中。
Lecithin, as a kind of important physiological activator and natural surface active agent, offers many advantages to health, and is widely used in the fields of food, pharmacy and cosmetic.
卵磷脂是重要的生理活性物质，也是一类天然的表面活性剂，广泛应用于食品、医药、化妆品等行业。
Lecithin, as a kind of important physiological activator and natural surface active agent, offers many advantages to health, and is widely used in the fields of food, pharmacy and cosmetic.
卵磷脂是重要的生理活性物质，也是一类天然的表面活性剂，广泛应用于食品、医药、化妆品等行业。
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