SCHOTT ProLab 4000, Руководство по эксплуатации

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Ion concentration ProLab 4000
11 8 ba75646e03 12/2012
9.6.3 Double standard addition
In the Double standard addition procedure, a known amount of stan-
dard solution is added to the sample in two steps.
First, one percent of the sample volume is added, then 2 percent of the
sample volume is added.
The ion concentration in the sample is calculated from the change in
potential between the first and second addition of standard solution.
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, Dou-
ble standard addition .
The ISE method : The Double standard addition window pops
up.
The
Sample register is open.
3 In the Sample register, enter the values for the sample volume
( Sample volume ) and the volume of the ISA/TISAB solution
( ISA/TISAB volume ) as necessary.
4 Use [Dosing] to automatically add the adjusted volume of the
ISA/TISAB solution ( ISA/TISAB volume ).
or
If the burette control is inactive:
Add the adjusted volume of the ISA/TISAB solution (
ISA/TISAB
volume ) manually.