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7.1.5 Known Addition Method (Single) Measurement
In the known addition method (Single), the targeted ion concentration in a sample solution
is obtained from a change in electric potential by adding once a small amount of the target
ion solution to the sample solution.
Measurement condition setting
1.
Tap
on the right of the known addition method item in the ION standard addition
mode screen.
2.
Tap
on the right of the Known add. method (Single) item.
3.
Set the measurement condition in the Known add. method (Single) screen.
Enter sample volume, concentration and volume of the standard solution to be added,
and electrode slope.
4.
Tap
after completing the setting.
The MEAS screen is displayed.
To return the set value to default, tap the
Setting item and range
Concentration of the additive standard solution: 0.1 mg/L to 19000.0 mg/L
Volume of the additive standard solution:
Electrode slope:
Sample volume:
HINT!
For more accurate measurement:
Normally, the amount of the standard solution to be added should be from 0.1% to 10% of
the sample solution. It is desirable that when the standard solution is added to the sample
solution, the concentration of the ion species under measurement increase by 1 time to 10
times in the sample solution. If the concentration of the added standard solution is too low
or if the volume of the added standard volume is larger than that of the sample, a large
error may occur in the measurement result.
5.
Immerse the ion electrode in sample solution and tap
The measurement starts. When the indication stabilizes, the HOLD indicator lights up
and the measurement value is determined.
6.
Tap
to proceed to the next measurement.
.
0.01 mL to 1000.00 mL
99.99 mV/dec to +99.99 mV/dec
1.0 mL to 19999.9 mL
.
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