GB/T 19276.1-2003 in English

《GB/T 19276.1-2003水性培养液中材料最终需氧生物分解能力的测定 采用测定密闭呼吸计中需氧量的方法》由TC380（全国生物基材料及降解制品标准化技术委员会）、全国塑料制品标准化技术委员会联合归口，主管部门为国家标准化管理委员会。
本标准规定了在试验条件下将试验材料曝置于由活性污泥、堆肥或土壤配制成的水性培养液中，并通过测量密闭呼吸计内消耗的氧气量来测定材料包括含添加剂的塑料的需氧生物分解能力的方法。

Scope

This standard specifies that under the test conditions, the test material is exposed to an aqueous culture solution prepared by activated sludge, compost or soil, and the oxygen consumption of the material, including plastics containing additives, is determined by measuring the amount of oxygen consumed in a closed respirometer. Aerobic biodegradability method. If activated sludge without proper treatment is used as the inoculum, this test only simulates the biodegradation process in a natural aqueous environment; if a mixed or pre-exposed inoculum is used, this method can be used to determine the potential of the test material. biodegradability. The test conditions adopted in this standard are not necessarily the best conditions for producing maximum biodegradability, but this standard is designed to determine the potential biodegradability of materials or to indicate the biodegradability of materials in natural environments. The accuracy of biodegradability assessment can be improved by calculating the carbon balance (for optional items, see Appendix E). This method is applicable to the following materials: - natural and (or) synthetic polymers, copolymers or their mixtures; - plastic materials containing additives such as plasticizers, pigments or other compounds; - water-soluble polymers; - Under the test conditions, the material will not produce an inhibitory effect on the microorganisms in the inoculum, and the inhibitory effect can be measured by the application of inhibition control or other appropriate methods. If the test material has an inhibitory effect on the inoculum, other inoculum or pre-exposed inoculum may be used at a lower test concentration.