Preparation instructions for P 700 IQ-solutions
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•
For photometric testing, the reagent solution is placed in an empty cuvette by means of
pipette and standard solution pipetted into it. Refer to Table 3 -1 for the precise dosing
amounts. Then seal the empty cuvette well and mix the solutions together by tilting the
cuvette back and forward several times.
Standard
solution
Model
Volume of
reagent solution
in µL
Volume of
standard solution
in µL
Total volume
in µL
ST8.0
240
4260
4500
Table 3-1: Dosing amounts of ST 8.0 reagent and standard solutions for preparing the reaction solution
•
Wait 5 minutes after mixing the reaction solution.
•
Measure the reaction solution in the photometer in the extinction mode at a wavelength of
420 nm. The reagent is in order if the extinction values specified in Table 3-2 can be
measured.
Standard solution Extinctions ± tolerance
ST8.0
0.585 ± 0.025
Table 3-2: Extinction, tolerance for reaction solution
General information on photometric measurement
•
The cuvettes must be clean. Wipe with a clean dry cloth if necessary.
•
The color of the reaction solution remains stable for approx. 60 minutes.
Using the test solution:
Only if the above criteria are fulfilled may the test solution be re-utilized for production.
Otherwise this formulation must be discarded.
Filling
After passing the test, at least 2500 mL of the standard solution is poured into the approved
containers and sealed tight with the associated closure (containers as per Chapter 5.1).
The containers are provided with the corresponding labels (see Chapter 5.2)
Shelf life
A shelf life as per Table 3-3 can be warranted for the reagent solution prepared in this way. It
is printed with the label (see Chapter 5.2) on the containers in MM.YY . MM.YY format.
Solution
Shelf life
RE 2.5
24 months
Table 3-3: Shelf lives for prepared reagent solution
Storage:
A shelf life for the cleaning solution as of production according to Table 3-3 is specified, from
which the shelf life data on the label of the respective container is derived.
For storage prior to use (transport, distribution center), a storage temperature of +5 °C…25
°C is recommended. Brief heating during this time to 35 °C is not a problem. In the worst
case, irreversible damage from precipitates or even frost damage can occur below 5 °C.
For subsequent use, depending on the weather, temperatures of +15 °C…+45 °C are
obtained in the P 700 IQ which is why the labeled shelf life date continues to be valid without
restriction.
Storage times must be limited to max. 6 months in order to safeguard corresponding usability
for the user.