Sample Preparation; Response Times; Interferences - wtw F 500 DIN Instrucciones De Operación

Sample preparation

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Sample preparation
Mix the standard solutions and test samples 1:1 with TISAB sample condi-
tioning solution. This sample conditioning solution creates optimum condi-
tions for measuring. It provides a constant ionic strength and similar diffusion
potentials at the reference electrode in standard solution and test sample.
If you would like to have more detailed information concerning sample prep-
aration and measuring procedures, WTW provides a large number of appli-
cation reports for various applications.

Response times

The response time depends on the concentration range. It is
 several seconds at high concentrations,
 several minutes near the detection limit.
The measured value is stable if the value does not change by more than
0.1 mV within 30 seconds.

Interferences

 pH values < 5 or > 7
F 500 / F 800
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