Ion concentration
ProLab 4000
126
ba75646e03
12/2012
9.6.5
Sample addition
In the
Sample addition
procedure, a known amount of test sample is
added to the standard solution.
The ion concentration in the sample is calculated from the change in
potential.
Calibration
Measuring
1
Check the currently displayed ion.
If the ion to be measured is displayed incorrectly:
Select the ion type in the menu,
Measuring
/
ISE methods
/
Ion
type
.
2
In the
Measuring
/
ISE methods
menu, select the method,
Sample addition
.
3
Carry out a two-point calibration according to the user guid-
ance (see page 106).
As soon as a stable value is achieved for the second standard
calibration solution, the slope (mV) and evaluation (Error, +++)
of the electrode after calibration is displayed.
The infotext,
Accept calibration and terminate
is displayed.
4
Using
[OK]
, confirm the infotext
Accept calibration and termi-
nate
.
The calibration record is displayed and output to the interface.
The calibration procedure is finished.
5
Close the calibration record with
[OK]
.
The
ISE method
: The
Sample addition
window pops up. The
Standard
register is displayed.
Содержание ProLab 4000
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Страница 86: ...pH ProLab 4000 86 ba75646e03 12 2012 Note A calibration line is determined for the two point calibration...
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