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Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
59-11pH Measurement
Using an iridium/iridium oxide (Ir/IrO
2
) electrode as an example, this redox couple is believed to be
re
presented
b
y
a
n
I
r(III)/Ir(IV)
h
alf-cell
r
eaction
o
f
t
he
f
orm
2 IrO O O
2
+ + +
+
2H 2e Ir H
2 3 2
(59.11)
e Ir/IrO
2
electrode shows a near Nernstian response of −59 mV per pH unit [7]. e chemical resis-
tance,
hi
gh-temperature
an
d
pr
essure
pe
rformance,
th
e
no
nglass
co
nstruction,
an
d
th
e
co
nsiderable
po
tential
fo
r
mi
niaturization
su
ggest
th
at
th
ese
pH se
nsors
wi
ll
n
d
ap
plication
in ar
eas
no
t
ty
pically
em
ployed
b
y
g
lass
m
embrane
e
lectrodes
o
r
p
HFETs
.
59
.2.4.2
Li
quid Membrane Electrodes
Another
ty
pe
of el
ectrochemical
pH ...
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Publisher Resources

ISBN: 9781439848913