论文部分内容阅读
将无水乙醇与正硅酸四乙酯按照4:1的比例混合水解,并用28%的氨水催化制备载体。选取溴酚蓝、甲酚红、氯酚红和刚果红各0.2mg作为混合p H敏感指示剂,采用溶胶凝胶法有机掺杂混合p H敏感指示剂制成具有宽量程的新型p H敏感膜,涂覆于光纤纤芯表面制成光纤p H传感器。利用光功率计验证修饰了该敏感膜的光纤p H传感器对p H值的响应范围、响应时间以及重复性和可逆性等各项性能。
Anhydrous ethanol and tetraethylorthosilicate were mixed and hydrolyzed at a ratio of 4: 1, and the carrier was prepared by catalytic catalysis with 28% aqueous ammonia. Choose 0.2 mg each of bromophenol blue, cresol red, chlorophenol red and congo red as a mixed p H-sensitive indicator and use a sol-gel method organic doping-mixed p H-sensitive indicator to make a novel p H-sensitive Film, coated on the surface of the fiber core fiber p H sensor. The optical pH meter was used to verify the response range, response time, repeatability and reversibility of the fiber p H sensor with this sensitive membrane modified.