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

Calcium Electrode Instruction Manual
18
between samples
Drift (reading
samples and standards allow solutions to come to room
slowly changing at different temperature before measurement
in one direction) temperatures
electrode exposed soak electrode in
to interferences calcium standard
incorrect reference use recommended
filling solution filling solution
incorrect pH adjust to pH 3-10
with NaOH or HCl
Low Slope or
standards contaminated prepare fresh standards
No Slope or incorrectly made
defective electrode check electrode operation
air bubble on membrane remove bubble by
re-dipping probe
electrode exposed to soak electrode in
interferences calcium standard
standard used as ISA use ISA
ISA not used use ISA