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Measuring the Induced Membrane Voltage with Di-8-ANEPPS

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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.

|May 1, 1993

Summary

This summary is machine-generated.

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.

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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.