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A fast response membrane-based pH indicator optode
T J Cardwell1, R W Cattrall, L W Deady
1Centre for Scientific Instrumentation, La Trobe University, Bundoora, Victoria 3083, Australia.
Talanta
|May 1, 1993
Summary
This study introduces a novel cellulose acetate optode membrane using a specific indicator for acid-base sensing. The developed sensor demonstrates fast response and durability, with successful application in a flow-cell system.
Area of Science:
- Chemical Sensors
- Analytical Chemistry
- Materials Science
Background:
- Optode membranes are crucial for chemical sensing applications.
- Developing fast-responding and durable sensors is an ongoing challenge.
Purpose of the Study:
- To describe a novel cellulose acetate based optode membrane.
- To incorporate an acid-base indicator for enhanced sensing capabilities.
- To evaluate sensor performance and demonstrate its application.
Main Methods:
- Fabrication of a cellulose acetate membrane incorporating 4-dimethylamino-4'-octylazobenzene as an acid-base indicator.
- Inclusion of diethyl phthalate, triethyleneglycol, and potassium tetrakis(4-chlorophenyl)borate as essential membrane components.
- Characterization of sensor behavior and performance evaluation in a flow-cell setup.
Main Results:
- The developed optode membrane exhibits fast response times.
- The sensor demonstrates good durability for practical applications.
- Successful application of the sensor in a flow-cell was achieved, validating its functionality.
Conclusions:
- The novel cellulose acetate optode membrane with the specified indicator is a promising candidate for acid-base sensing.
- The combination of components ensures a robust and efficient sensor.
- The demonstrated flow-cell application highlights the sensor's practical utility.
