eutech-instruments silversulfide epoxy User Manual
Instruction Manual
Silver/Silver Sulfide Electrode
25
Low Slope or
standards contaminated
prepare fresh standards
No Slope
or incorrectly made
ISA not used
use recommended ISA
standard used as ISA
use ISA
electrode exposed
check section entitled
to complexing agents
Complexation
air bubble on membrane
remove bubble by
re-dipping probe
"Incorrect Answer"
incorrect scaling of
plot millivolts on the linear
(but calibration
semi-log paper
axis. On curve is good)
the log axis, be sure that
concentration
numbers
within
each
decade
are
increasing
with
increasing
concentration
incorrect sign
be sure to note sign of
millivolt
number
correctly
incorrect standards
prepare fresh standards
wrong units used
apply correct conversion
factor:
1.0X10
-3
M= 32.1 ppm S
-2
= 2.0X10
-3
N (S
-2
);
= 108 ppm Ag
+1
complexing agents
check section entitled
in
sample
Complexation