本文件规定了确定塑料材料需氧生物降解程度和速率的实验室试验方法。塑料材料的生物降解是通过在实验室条件下暴露于从沿海地区取样的海水时，在封闭式呼吸计中测量需氧量来确定的。 本文件中描述的条件可能并不总是与最大生物降解程度的最佳条件相对应，但本试验方法旨在给出塑料材料潜在生物降解性的指示。 注:本文件涉及塑料材料，但也可用于其他材料。

This document specifies a laboratory test method for determining the degree and rate of the aerobic biodegradation level of plastic materials. Biodegradation of plastic materials is determined by measuring the oxygen demand in a closed respirometer when exposed to seawater sampled from coastal areas under laboratory conditions. The conditions described in this document might not always correspond to the optimum conditions for the maximum degree of biodegradation, however this test method is designed to give an indication of the potential biodegradability of plastic materials. NOTE This document addresses plastic materials but can also be used for other materials.