ABDUKADER·ABDUKAYUM. An organically modified sol-gel sensing film for detection of nitrite[J]. 2011, 30(2): 35-36+40. DOI: 10.13873/j.1000-97872011.02.038.
有机改性溶胶—凝胶传感膜检测亚硝酸根
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=0.992 9)
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。
Abstract
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=0.9929)to nitrite in a range of 0.1
0
.001mg·L-1 with a detection limit of 3×10-4mg·L-1.The response time is less than 1min.This sensing film shows high selectivity