Optical pH Sensor Based on Quinizarin for Alkaline pH Regions
نویسندگان
1 Center of Excellence for Color Science and Technology,Department of Organic Colorants, Institute of Color Science and Technology
2 Department of Organic Colorants, Institute for Color Science and Technology
doi
10.30509/pccc.2008.75703چکیده
The development of an optical pH sensor based on immobilization of quinizarin (1,4-dihydroxyanthraquinone) on a triacetylcellulose membrane was described. The resulting membrane exhibited fast color change from yellow to violet, while changing the pH in alkaline region. The immobilized quinizarin showed a broader dynamic range from (pH 9.4-11.4) with respect to free form (pH 8.8-10.4). The sensor response was fully reversible and fast (
