硒与氟离子对美丽猛水蚤的联合毒性

Joint Toxicity of Selenium and Fluoride ions to Harpacticoidea copepod, Nitocra spinipes.

为了探讨硒氟共存的毒性变化机制，按硒与氟离子１：１０、１：２０和１：３０三个浓度配比进行面与氟对美丽猛水蚤（ＮｉｔｏｃｒａＳｐｉｎｉｐｅｓ）的联合毒性实验。结果表明，硒与氟对美丽猛水蚤的单一毒性：９６ｈＳｅ４＋Ｌｃ５０为９．２（７．４—１５）ｍｇ／Ｌ，９６ｈＦ－ＬＣ５０为２９０（２８４—２９６）ｍｇ／Ｌ；硒与氟的联合毒性为桔抗作用。美丽猛水蚤是毒物联合毒性研究的优秀实验生物，毒性单位法及相加指数法都是测定水中毒物联合毒性的有效方法。

The toxicity of selenium and fluoride ions were determined on bioassay of harpacticoidea copepod,Nitocra spinipes. Median lethal concentration(96h LC50)of selenium and fluoride were 9.2(7.4-15) mg/L and 290 (284-- 296 ) mg/ L,respectively.Three combinations of selenium and fluoride were tested(1: 10, 1: 20, 1:30 ratio of selenium to fluoride).The methods of toxic unit analysis and Marking' s additive index were used to evaluate the joint toxicity. The results showed that the joint toxicity of selenium with fluoride ions were antagonism on the harpacticoidea copepod.