水质.对网纹水蚤属Ceriodaphnia dubia慢性毒性的测定

[中文适用范围]： 本国际标准规定了以（7±1）d后的繁殖抑制为基础测定对Ceriodaphnia dubia（枝角类、甲壳类）慢性毒性的方法。 该方法适用于： a) 在试验条件下可溶或能保持稳定悬浮液或分散体的化学物质； b) 工业或污水废水，如果适用的话，经过倾析、过滤或离心处理后； c) 淡水； d) 水提取物。 本国际标准不适用于河口或海洋环境中水生样品的检测。 [外文原描述]： ISO 20665:2008 specifies a method for the determination of the chronic toxicity to Ceriodaphnia dubia (Cladocera , Crustacea), based on reproduction inhibition after (7 ± 1) d. The method is applicable to: a) chemical substances which are soluble or which can be maintained as stable suspensions or dispersions under the conditions of the test; b) industrial or sewage effluents, if appropriate after decantation, filtration or centrifugation; c) fresh waters; d) aqueous extracts (leachates, eluates, and elutriates). ISO 20665:2008 is not applicable to the testing of aquatic samples from the estuarine or marine environment.