ISO 5148:2022 塑料 在中温实验室试验条件下测定固体塑料材料的特定需氧生物降解速率和消失时间（DT50）
标准编号：ISO 5148:2022
中文名称：塑料 在中温实验室试验条件下测定固体塑料材料的特定需氧生物降解速率和消失时间（DT50）
英文名称：Plastics — Determination of specific aerobic biodegradation rate of solid plastic materials and disappearance time (DT50) under mesophilic laboratory test conditions
发布日期：2022-06
标准范围
本文件规定了一种测定固体非水溶性塑料材料在嗜温条件下的比好氧生物降解速率的方法。笔记？比好氧生物降解率（严格地说，是比矿化率，意味着评估有机碳转化为CO2，但忽略生物质形成）表示为每单位时间、每单位面积矿化为CO2的碳量。本文件中描述的方法没有提供关于测试样品的最终需氧生物降解性的信息。塑料材料在中温条件下的生物降解性标准例如由ISO？23517，还有ISO？22403.只有当使用合适的标准规范，如ISO？23517和ISO？22403.此外，对最终生物降解性尚未得到证实的塑料材料测定的生物降解率不应被视为整个材料的特定特性。本文件仅考虑CO2的演化作为测试样品矿化的直接测量。本文中描述的方法也可应用于用作参考的固体材料。本文件不适用于可生物降解塑料材料的“海洋、土壤和淡水生物降解”声明。为此，请参阅相关产品标准（如果有）。笔记？尽管结果可以表明测试的塑料材料和聚合物将在规定的测试条件下以特定的有氧生物降解速率或DT50进行生物降解，但任何实验室暴露的结果都不能直接适用于实际使用或泄漏现场的环境隔室，包括土壤、海洋环境和湖沼区域。
This document specifies a method to determine the specific aerobic biodegradation rate of solid, non-water soluble plastic materials under mesophilic conditions.NOTE The specific aerobic biodegradation rate (which, strictly speaking, is a specific mineralization rate, implying the assessment of the conversion of organic carbon into CO2 but neglecting biomass formation) is expressed as amount of carbon mineralized into CO2, per unit time, per unit area.The method described in this document does not provide information on the ultimate aerobic biodegradability of the tested samples. Biodegradability criteria for plastic materials under mesophilic conditions are provided for example by ISO 23517, and ISO 22403. The method described in this document shall be used to determine the DT50 only when the plastic material is proven to be intrinsically biodegradable using suitable standard specifications such as ISO 23517 and ISO 22403. Furthermore, the biodegradation rate determined on plastic materials whose ultimate biodegradation has not been proven, shall not be considered as a specific characteristic of the whole material.This document only considers the evolution of CO2 as direct measurement of mineralization of the tested sample.The method described in this document may be applied also to solid materials used as a reference.This document is not applicable for “marine, soil and freshwater biodegradable” claims of biodegradable plastic materials. For such purposes, see relevant product standards if available.NOTE Although results can indicate that the tested plastic materials and polymers will biodegrade under the specified test conditions at a certain specific aerobic biodegradation rate or DT50, the results of any laboratory exposure are not directly applicable to environmental compartments including soil, marine environments and limnic areas at the actual site of use or leakage.
标准预览图
