A fast response membrane-based pH indicator optode.
A cellulose acetate based optode membrane containing 4-dimethylamino-4'-octylazobenzene as an acid-base indicator is described. Other essential components of the membrane for a fast-responding and durable sensor are diethyl phthalate, triethyleneglycol and potassium tetrakis(4-chlorophenyl)borate. Factors affecting the sensor behaviour are discussed and an application in a flow-cell is demonstrated.
Cardwell
T J
TJ
Centre for Scientific Instrumentation, La Trobe University, Bundoora, Victoria 3083, Australia.
Cattrall
R W
RW
Deady
L W
LW
Dorkos
M
M
O'Connell
G R
GR