This technique takes advantage of the fact that the product of hydrolysis of propylene glycol alginate(PGA),alginic acid,is insoluble in water and can be filleted off and quantified.

• 介绍了称量法测定新型杀虫剂美加农(0.；12%25藻酸丙二醇酯可溶液剂)中有效成分的方法。