水质.48小时内对萼花臂尾轮虫Brachionus calyciflorus慢性毒性的测定

[中文适用范围]： 本标准规定了以48 h种群生长抑制为基础测定萼花臂尾轮虫慢性毒性的方法。 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，经过处理或未经处理，如果适用的话经过倾析、过滤或离心处理； c) 淡水； d) 水提取物。 本标准不适用于水中不稳定化学物质（水解、吸收等）的测试（除非测量暴露浓度），也不适用于来自河口或海洋环境的水样样品的测试。 [外文原描述]： ISO 20666:2008 specifies a method for the determination of the chronic toxicity to rotifer Brachionus calyciflorus , based on population growth inhibition in 48 h. 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, treated or untreated, if appropriate after decantation, filtration or centrifugation; c) fresh waters; d) aqueous extracts. ISO 20666:2008 is not applicable to the testing of unstable chemicals (hydrolysing, absorbing, etc.) in water unless exposure concentration is measured, nor to the testing of aquatic samples from the estuarine or marine environment.