聚乙烯、聚苯乙烯、聚丙烯为原料的各种食具容器包装品及食用包装薄膜等，其中高锰酸钾消耗量的测定，常采用草酸--高锰酸钾容量法，操作繁琐，本文取塑料包装薄膜应用一阶导数光谱法测定。现将结果报告如下：一、现定原理样品用“℃水浸泡后，加入一定量的Na人和0．002ed／LKMn Polyethylene, polystyrene, polypropylene raw materials for a variety of food containers and packaging food packaging films, including the determination of potassium permanganate consumption, often using oxalic acid - potassium permanganate capacity method, the operation is cumbersome, In this paper, the first plastic film should be determined by the first derivative spectrophotometry. The results are reported as follows: First, the principle of the present set of samples with ”water soaked, add a certain amount of Na and 0.002ed / LKMn