论文部分内容阅读
用N235作流动载体,Span80作表面活性剂的乳化液膜富集环境水样中的氟,研究了载体和表面活性剂的用量、油内比、乳水比、外相初始pH等因素对氟回收率的影响。实验结果表明,当载体体积分数5%、表面活性剂体积分数3%、油内比1∶1、内相NH4Cl质量浓度3%、水样初始pH 8、乳水比1∶5时,氟的回收率可达99.5%以上。考察了20多种共存离子的影响,结果表明方法具有良好的选择性。运用该法富集、测定环境水样中的F-,相对标准偏差<3.4%,加标回收率为95.5%～103.3%。
With N235 as mobile carrier, Span80 as surfactant emulsion membrane enrichment of fluorine in environmental water samples, the amount of carrier and surfactant, oil ratio, the ratio of water, the initial pH of the external phase and other factors on fluorine recovery Rate of impact. The experimental results showed that when the volume fraction of the carrier 5%, the volume fraction of surfactant 3%, the oil internal ratio 1: 1, the mass concentration of NH4Cl 3%, the initial water pH 8, the ratio of 1: The recovery rate of up to 99.5%. The effects of more than 20 kinds of coexisting ions were investigated. The results show that the method has good selectivity. Using this method enrichment, determination of F - in environmental water samples, the relative standard deviation of <3.4%, recovery of 95.5% to 103.3%.