标准摘要
[中文适用范围]： ISO 14592 的这一部分规定了一种通过带有附着生物量的连续流动河流模型来评估天然水中好氧微生物对有机测试化合物的生物降解性的方法。 ISO 14592 的这一部分适用于浓度低于系统中天然碳底物浓度的有机测试化合物。 在这些条件下，测试化合物充当次要底物，生物降解动力学预计为一级（“非生长”动力学）。 ISO 14592 的这一部分适用于有机测试化合物，在测试条件下和选定的测试浓度下，其： ——水溶性； ——可用适当的分析方法定量检测或以放射性标记的形式提供； ——水溶液中不挥发（例如亨利定律常数 < 1 Pa·m/摩尔）； ——没有显着吸附； ——不被光解； ——对测试系统中的微生物没有抑制作用。 不建议将该测试用作最终生物降解性（矿化）的证明，最好使用其他标准化测试进行评估（参见 ISO/TR 15462）。 [外文原描述]： ISO 14592-2:2002 specifies a method for evaluating the biodegradability of organic test compounds by aerobic microorganisms in natural waters by means of a continuous flow river model with attached biomass. ISO 14592-2:2002 is applicable to organic test compounds present in lower concentrations than those of natural carbon substrates also present in the system. . Under these conditions, the test compounds serve as a secondary substrate and the kinetics for biodegradation would be expected to be first order (non-growth kinetics). ISO 14592-2:2002 is applicable to organic test compounds, which under the conditions of the test and at the chosen test concentration, are water soluble, quantitatively detectable with appropriate analytical methods or available in radiolabelled form, non-volatile from aqueous solution, not significantly adsorbed, not photolyzed and not inhibitory to the microorganisms of the test system. This test is not recommended for use as proof of ultimate biodegradability (mineralization) which is better assessed using other standardized tests.
英文名称Water quality — Evaluation of the aerobic biodegradability of organic compounds at low concentrations — Part 2: Continuous flow river model with attached biomass