horiba 5002S-10C, Instruction Manual

Page: 44 / 79

32
1
Prepare the sample solution.
In this section, the case using sample solution (250 mg/L) is used as an
example in the following steps.
(1) Put 50 mL of sample solution
(concentration of 250 mg/L) in a 100
mL beaker.
(2) Add 1 mL of pH-adjusting ISA.
(3) Stir the solution slowly with a magnetic
stirrer.
2
Rinse the electrode with pure water.
Make sure that the membrane part has been
well rinsed with pure water.
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
too fast. Reduce the speed to
a level where swirling does not
occur.
About the amount of pH-adjusting ISA
In the case using different volume from the example, note
that the volume ratio shall be the sample solution: the pH-
adjusting ISA = 50:1
(1)
Sample solution
(250 mg/L):
50 mL
(2)
pH-adjusting ISA:
1 mL
Beaker:
100 mL
(3)
Stir the solution slowly
with a magnetic stirrer.
Note Note
Note Note