Horiba Scientific 6560S-10C Instruction Manual page 45

(1) Put 50 mL of sample solution
(concentration of 250 mg/L) in a 100
mL beaker.
(2) Add 1 mL of ISA.
(3) Stir the solution slowly with a magnetic
stirrer.
It is best to control the stirring
speed so that the stir bar will
rotate 3 or 4 turns per second.
If swirling occurs on the
surface, the stirring speed is
Note Note
too fast. Reduce the speed to
a level where swirling does not
occur.
About the amount of ISA
(
In the case using different volume from the example, note
Note Note that the volume ratio shall be the sample solution: the ISA =
50:1.
2
Rinse the electrode with pure water.
3
Wipe off the moisture.
Wipe off the moisture using soft and clean lint-free paper or cloth.
"About activity" (page 60))
(2)
ISA:
1 mL
(1)
Sample solution
(250 mg/L):
50 mL
(3)
Stir the solution slowly
with a magnetic stirrer.
Beaker:
100 mL
33