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General Information
1.2
Instructions for use
Request the safety data sheets.
–
Reagents are intended for chemical analysis and access to them by
–
unauthorised persons must not be permitted.
You must dispose of reagent solutions properly.
–
Observe the application possibilities, analysis instruction and matrix
–
effects of the methods.
1.
You must thoroughly clean the cuvettes, lids and stirring rod after each
analysis to avoid carry-over errors.
Even slight reagent residue can lead to incorrect measurement results.
For cleaning use the supplied brush.
If the fully reacted water sample is left for any length of time it may pro‐
duce stubborn coloured deposits, which you can remove using dilute (= 4
%) hydrochloric acid.
2.
The outer walls of the cuvettes must be clean and dry before the analysis
is carried out. Fingerprints or water droplets on the light-entry surfaces of
the cuvette will result in faulty measurements. The cuvette should there‐
fore be wiped clean with a soft paper tissue (paper handkerchief) before
carrying out the measurement.
3.
The zero correction and the analysis must both be carried out using the
same cuvette, as the cuvettes may have slightly varying tolerances.
8
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