Thermo Fisher Scientific Dioxide Ion Selective Electrodes Carbon - Manual (Page 18)

Instruction Manual Carbon Dioxide Electrode
18
incorrect internal filling refill outer body of electrode
solution using filling solution shipped
with electrode
total sample level dilute sample of dissolved
species above 1M
electrode in sample reduce surface area-to-
too long; CO
2
loss volume ratio, slow down rate
of stirring, avoid high
temperatures
membrane failure replace membrane
(wet, perforation, discoloration)
samples and standards allow samples and standards
not at constant to come to room temperature
temperature before use
heat generated by place insulating material
magnetic stirrer between stirrer and beaker
defective inner body refer to
Checking the
Electrode Inner Body
electrode exposed to hold electrode by outer body
air for extended period and pull on electrode cable.
Internal filling solution will
flow under membrane and
restore electrode response
Low Slope or No Slope
standards contaminated prepare fresh standards
or incorrectly made
buffer not used use recommended buffer
standard used as use buffer
buffer
electrode exposed hold electrode by outer body
to air for extended and pull on electrode cable.
period Internal filling solution will
flow under membrane and
restore electrode response
membrane failure replace membrane
(wet, perforation, discoloration)
defective inner body refer to
Checking the
Electrode Inner Body