Chapter 5 Ion Measurement (F-53,55)
5.3 Measurement Using Standard Addition Method
F-52, 53, 54, 55 69
● Setting the Measurement condition
Input such setting items as sample volume,
concentration and volume of the additive
standard solution, and slope.
1. Press ↑ or ↓ key to select the
option to be input.
2. Press the ENTER key.
The display color of the setting part
changes.
3. Press ↑ or ↓ key. After the value
is determined, press the ENTER
key.
Setting item and range
4. When the setting is completed,
press F4 (START).
The Measurement screen appears.
For more accurate measurement
Normally, the added amount of the standard solution should be from 0.1% to 10% volume of
the sample solution. It is desirable that when the standard solution is added to the sample solu
-
tion, the concentration of the ion species under measurement increase by 1 to 10 times in the
sample solution. It is therefore necessary to consider the concentration and added amount of
the standard solution well. If the concentration of the added standard solution is too low, if the
volume of the added standard volume is too larger than that of the sample, then a large error
may occur in the measurement result.
The slope depends on the Ion electrode. Input the slope of Ion electrode (potential slope) to
be measured. (Refer to" ● Types and Features of Applicable Electrodes" page 235)
Sample volume: 1.0 to 19999.9 mL
Concentration of the
additive standard solu
-
tion:
0.1 to 19000.0 mg/L
Volume of the additive
standard solution
:
0.01 to 1000.00 mL
Slope: +199.00 to -199.00 mV/dec
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