Cloud Point Extraction Using Triton X-100 at Low Temperature for Trace Analysis of Silver in Sediment and Environmental Water with Flame Atomic Absorption Spectrometry

摘要：

　　N-octanol can dramatically decrease the cloud point of Triton X-100,a new and simple cloud point extraction (CPE)method using rhodanine as chelating agent for the preconcentration of trace level silver and determined by flame atomic absorption spectrometry(FAAS) was developed.The effect of different experimental conditions on the extraction of silver from aqueous solutions was investigated.The result showed that the cloud point of surfactant can decreased from 65 C to 36 C by adding 1.2ml n-oetanol.Under optimum conditions (pH range 3.0-5.0,0.5ml 0.5mol/L rhodanine,2.0ml 10% Triton X-100,equilibrium temperature:40 C,equilibrium time:30min).The limit of detection was 0.18μg/L (3σ) for silver and the preconcentration factor could be as high as 42.The results of standard reference sediment analysis indicated the accuracy and sensitivity of the method.The proposed method was applied to the determination of trace silver in sediment and environmental water samples with expected result.

关键词： silver low temperature cloud point extraction n-octanol FAAS

作者: XIE Fazhi ZHANG Fengjun XUAN Han GE Yejun ZHU Peng TANG Zhi

作者单位: School of materials Science and Chemical Engineering, Anhui University of Architecture, Hefei 230022 School of civil Engineering and Architecture, Nanchang University, Nanchang, 330031 Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China

会议类型: 国际会议

会议名称: The 4th International Conference on Environmental Technology and Knowledge Transfer(第四届亚欧环境技术及知识转化国际研讨会(2012ICET))

会议地点: 合肥

会议语种:英文

页码: 733-737

在线出版日期: 2012-05-24（万方平台首次上网日期，不代表论文的发表时间）