摘要
以二甲基二乙氧基硅烷与四乙氧基硅烷为有机-无机复合前驱体,番红花红为敏感指示剂,利用溶胶-凝胶法研制出有机改性传感膜。实验结果表明:在酸性条件下传感膜与亚硝酸根作用,导致吸光度降低,且在一定范围内与亚硝酸根浓度呈良好的线性关系(R=0.9929),线性范围为0.001—0.1mg·L-1,检出限为3×10 -4mg·L-1,响应时间小于1min。该传感膜具有选择性高、稳定性和重复性好的特点。
An organically modified sensing film was prepared by sol-gel method, using Dimthyldimethoxysilane and Tetraethoxysilane as the organic-inorganic composite precursor, Crocus Red as the indicator. The experimental result shows that sensing film reacted with nitrite in the acidic medium, causing a decrease in the absorbency of film. The sensing film has a good linear response (R =0. 992 9 )to nitrite in a range of 0.1 -0. 001 mg · L-1 with a detection limit of 3 × 10-4 mg · L-1. The response time is less than 1rain. This sensing film shows high selectivity, well stability and repeatability.
出处
《传感器与微系统》
CSCD
北大核心
2011年第2期35-36,40,共3页
Transducer and Microsystem Technologies
基金
新疆维吾尔自治区高校科研计划资助项目(XJEDU2008S56)