Chapter 5 Ion Measurement (F-53,55)
5.3 Measurement Using Standard Addition Method
F-52, 53, 54, 55 75
● Setting the Measurement condition
Input such setting items as sample volume,
concentration and volume of the additive
standard solution, and slope.
The slope depends on the Ion electrodes;
input the slope of Ion electrode (potential
slope) to be measured.
" ● Types and Features of Applicable
Electrodes" page 235
1. Press ↑ or ↓ key and select the
option to be set.
2. Press the ENTER key.
The display color of the setting part
changes.
3. Press ↑ or ↓ key to change the
value.
4. When the value input is completed,
press the ENTER key.
Setting range:
5. When the setting is completed,
press F4 (START).
For more accurate measurement:
Normally, the added amount of the sample should be from 0.1% to 10% volume of the stan-
dard solution. It is desirable that when the standard buffer is added to the sample solution, 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 of the standard solution and
added amount of the sample well. If the concentration of the added sample is too low, if the
volume of the added sample is too larger than that of the standard solution, then a large error
may occur in the measurement result.
Sample volume: 1.0 to 19999.0 mL
Concentration of the
additive standard solu
-
tion:
0.1 to 19000 mg/L
Volume of the additive
standard solution:
0.01 to 1000 mL
Slope: +199.00 to -199.00 mV/dec
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