eutech-instruments cadmium epoxy 用户手册
Instruction Manual
Cadmium Electrode
19
incorrect reference
use recommended
filling solution
filling solution
Low Slope or
standards contaminated
prepare fresh
No Slope
or incorrectly made
standards
ISA not used
use recommended ISA
standard used as ISA
use ISA
electrode exposed
check section
to complexing agents
entitled
Precipitation
and Complexation
air bubble on
remove bubble by
membrane
redipping probe
"Incorrect Answer"
incorrect scaling
plot millivolts on
(but calibration
of semi-log paper
the linear axis. On
curve is good)
the log axis, be sure
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:
10
-3
M = 112 ppm as Cd
+2
complexing agents
check section entitled
in sample
Precipitation and
Complexation;
use titration