ISO 14593-1999 水质 水介质中有机化合物最终有氧生物降解能力的评价 密封容器中无机碳分析法(CO2顶空试验)

标准号：ISO 14593-1999
中文标准名称：水质 水介质中有机化合物*终有氧生物降解能力的评价 密封容器中无机碳分析法(CO2顶空试验)
英文标准名称：Water quality - Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium - Method by analysis of inorganic carbon in sealed vessels (CO
标准类型：Z16;C51
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：Z16;C51
国际标准分类号：13.060.70
适用范围：This International Standard specifies a method, by analysis of inorganic carbon, for the evaluation in an aqueous medium of the ultimate aerobic biodegradability of organic substances at a given concentration of microorganisms. This International Standard is applicable to organic compounds which are: a) water-soluble under the test conditions; b) poorly water-soluble under the test conditions, in which case special measures may be necessary to achieve a good dispersion of the compound (see ISO 10634); c) volatile; d) not inhibitory to the test microorganisms at the concentration chosen for the test. In this test, biogenically produced inorganic carbon is measured in situ in the test vessels in such a manner that the rate measured nearly equals the rate of microbial production. NOTE 1 The conditions described in this International Standard do not always correspond to the optimal conditions for allowing the maximum degree of biodegradation to occur. For alternative biodegradation methods see ISO 15462. NOTE 2 With highly volatile substances, losses to the gaseous phase can be minimized by reducing the volume of the headspace. However, there should be sufficient oxygen in the test system to prevent biodegradation being oxygen-limited. NOTE 3 The presence of an inhibitory effect can be determined as specified in 8.3, or by using any other method for determining the inhibitory effect of a substance on bacteria (see, for example, ISO 8192).