Polyfoam (Polystyrene), called EPS, is a kind of white foaming agent with air for filling material. One of materials using for packaging extensively.

保利龙(聚苯乙稀)简称EPS为白色发泡材料，以空气为填充质，是广泛应用于包装的材料之一。

After the testing on adsorption of impurity by polyfoam and adsorption conditions, the ideal working condition was determined for the analytical instrument.

对泡沫塑料吸附中杂质、吸附条件等进行试验，选择了较好的仪器及工作条件。