塑料 - 海水/沉积物界面中非浮选塑料材料有氧生物降解的测定 - 通过分析演化二氧化碳

[中文适用范围]： 本文件规定了一种测试方法，通过测量释放的二氧化碳（CO2）来确定塑料材料沉降在海水与海底界面的海洋沙质沉积物上时的需氧生物降解程度和速率。 该测试方法也可应用于其他固体材料。 该测试方法是在实验室条件下模拟海洋中不同海水/沉积物区域中发现的栖息地，例如阳光到达海底的底栖区域（透光区域），在海洋科学中称为近岸区域。 埋藏在海洋沉积物中的塑料材料和其他固体材料的生物降解测定不属于本文件的范围。 注：有氧生物降解的测量也可以通过监测耗氧量来获得，如 ISO 18830 中所述。 本文件中描述的条件并不总是对应于发生最大程度生物降解的最佳条件。 [外文原描述]： This document specifies a test method to determine the degree and rate of aerobic biodegradation of plastic materials when settled on marine sandy sediment at the interface between seawater and the seafloor, by measuring the evolved carbon dioxide (CO 2 ). This test method can also be applied to other solid materials. This test method is a simulation under laboratory conditions of the habitat found in different seawater/sediment-areas in the sea, e.g. in a benthic zone where sunlight reaches the ocean floor (photic zone) that, in marine science, is called sublittoral zone The determination of biodegradation of plastic materials and other solid materials buried in marine sediment is outside the scope of this document. NOTE Measurement of aerobic biodegradation can also be obtained by monitoring the oxygen consumption, as described in ISO 18830. The conditions described in this document do not always correspond to the optimum conditions for the maximum degree of biodegradation to occur.