期刊
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
卷 384, 期 2, 页码 488-494出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00216-005-0187-2
关键词
inorganic-organic hybrid material; optical sensor; cadmium; 4-(2-pyridylazo)resorcinol; industrial effluents
A novel and low-cost optical sensor for the naked eye detection of Cd2+ in aqueous media based on mesoporous silica containing 4-(2-pyridylazo) resorcinol (PAR) as a probe molecule anchored by N-trimethoxysilylpropyl-N, N,N-trimethylammonium chloride (TMAC) was prepared. The effects of various factors such as pH, solvent volume, temperature, reaction time, amount of the material, and the presence of various ions were studied in order to optimize operating conditions. The detection was based on the color change of PAR from orange-yellow to purple as a result of complexation with Cd2+. The intensity of the Cd-PAR complex varies linearly with the Cd2+ concentration, from zero to 1.78 x 10(-7) mol dm(-3). The detection and quantification limits for the method when determining Cd2+ were 1.75 x 10(-8) and 5.77 x 10(-8) mol dm(-3), respectively, with a correlation coefficient of 0.99. Good chemical stability of the material was observed for a period of five months. The developed sensor was applied to the analysis of various industrial effluents and tap water samples.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据