Toxicity of Selected Imidazolium-based Ionic Liquids on Caenorhabditis elegans： a Quantitative Structure-Activity Relationship Study

Due to the large number of ionic liquids （ILs） and their potential environmental risk, assessing the toxicity of ILs by ecotoxicological experiment only is insufficient. Quantitative structure- activity relationship （QSAR） has been proven to be a quick and effective method to estimate the viscosity, melting points, and even toxicity of ILs. In this work, the LC50 values of 30 imidazolium-based ILs were determined with Caenorhabditis elegans as a model animal. Four suitable molecular descriptors were selected on the basis of genetic function approximation algorithm to construct a QSAR model with an R^2 value of 0.938. The predicted lgLC50 in this work are in agreement with the experimental values, indicating that the model has good stability and predictive ability. Our study provides a valuable model to predict the potential toxicity of ILs with different sub-structures to the environment and human health.

疑似有毒饮料的应急检测

目的对疑似有毒饮料样品进行消毒剂有效化学成分排查后,进行应急毒性检测和评价。方法采用啮齿类动物小鼠急性经口毒性试验、秀丽隐杆线虫急性毒性试验、细胞毒性试验(中性红法)对受试样品进行毒性检测评价,采用化学成分定性排查方法对受试样品进行消毒剂有效化学成分排查。结果疑似有毒饮料样品小鼠急性经口毒性试验,经口灌胃给予40 ml/kg BW后受试动物均出现不同程度的中毒表现,3 d内2/5的小鼠出现死亡;秀丽隐杆线虫毒性试验,在0 mg/ml、1.00 mg/ml、2.15 mg/ml、4.64 mg/ml、10.00 mg/ml浓度下染毒24 h后,线虫出现死亡,LC50为3.4 mg/ml,具有毒性;受试物的CHL哺乳动物细胞毒性试验结果为3级,为中度毒性;化学成分定性排查显示疑似有毒饮料中含次氯酸钠。结论疑似有毒饮料样品的急性毒性检测结果显示受试小鼠出现不同程度的中毒表现及死亡;秀丽隐杆线虫毒性试验结果为有线虫毒性;CHL细胞毒试验结果为有细胞毒性。通过对疑似有毒饮料样品的一般性状及消毒剂有效化学成分排查,明确了疑似有毒饮料样品中含次氯酸钠,由于84消毒液等消毒剂的有效成分是次氯酸钠,故初步判断样品中可能混有84消毒液或次氯酸钠化学试剂。