ISO 16221:2001 水质-海洋中生物降解测定导则

标准编号：ISO 16221:2001

中文名称：水质-海洋中生物降解测定导则

英文名称：Water quality — Guidance for determination of biodegradability in the marine environment

发布日期：2001-02

标准范围

本国际标准规定了五种测定有机污染物最终需氧生物降解性的方法海洋环境中的化合物由静态含水试验系统中的需氧微生物测定。标准为在淡水中进行试验而开发的降解方法经过了修改，并适应了海洋条件。这些方法包括DOC脱模试验（ISO 7827）、闭瓶试验（ISO 10707）、两相闭瓶试验试验（ISO 10708）、CO2释放试验（ISO 9439）和CO2顶空试验（ISO 14593）。这些方法适用于a） 在所用试验条件下是水溶性的；b） 在所用试验条件下，水溶性较差，在这种情况下，可能需要采取特殊措施实现化合物良好分散所必需的（例如，参见ISO 10634）；c） 易挥发，前提是使用了具有适当条件的适当试验；d） 在为试验选择的浓度下，对试验微生物没有抑制作用。存在抑制作用可根据本国际标准的规定进行测定。注:本国际标准中所述的条件并不总是与试验的最佳条件相对应允许最大程度的生物降解。淡水中的生物降解方法见ISO 14593和ISO 15462，低浓度下的生物降解见ISO 14592。

This International Standard specifies five methods for determining the ultimate aerobic biodegradability of organiccompounds in the marine environment by aerobic microorganisms in static aqueous test systems. Standarddegradation methods developed for testing in fresh water are modified and adapted to marine conditions. Thesemethods are the DOC die-away test (ISO 7827), the closed bottle test (ISO 10707), the two-phase closed bottletest (ISO 10708), the CO2 evolution test (ISO 9439) and the CO2 headspace test (ISO 14593).The methods apply to organic compounds whicha) are water-soluble under the conditions of the test used;b) are poorly water-soluble under the conditions of the test used, in which case special measures may benecessary to achieve good dispersion of the compound (see for example, ISO 10634);c) are volatile, provided that an appropriate test with suitable conditions is used;d) are not inhibitory to the test microorganisms at the concentration chosen for the tests. The presence ofinhibitory effects can be determined as specified in this International Standard.NOTE The conditions described in this International Standard do not always correspond to the optimal conditions forallowing the maximum degree of biodegradation to occur. For biodegradation methods in fresh water see ISO 14593 andISO 15462, and for biodegradation at low concentrations see ISO 14592.

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