Water I.D. Primelab 2.0, Manual

Page: 61 / 301

(04)
Aluminium
0.00 - 0.30 mg/l (Al)
Tablet
Internal Name: 04-Aluminium-tab
10ml
Aluminium N°1 Photometer (TbsHAlm1)
Aluminium N°2 Photometer (TbsPAlm2)
Measurement procedure:
1 Fill 10 ml test water into a clean 24 mm cuvette.
2 Screw the lid back on the cuvette.
3 Insert the cuvette into the PrimeLab. Pay attention to the arrow on the front of the cuvette.
4 Start ZERO measurement.
5 Remove the cuvette again.
6 Unscrew the lid from the cuvette.
7 Add 1 Aluminium N°1 Photometer tablet(s) to the test water in the cuvette.
8 Crush the tablet with a clean stirring rod.
9 Stir with the stirring rod for about 20 seconds until the reagent is completely dissolved.
10 Add 1 Aluminium N°2 Photometer tablet(s) to the test water in the cuvette.
11 Crush the tablet with a clean stirring rod.
12 Stir with the stirring rod for about 20 seconds until the reagent is completely dissolved.
13 Screw the lid back on the cuvette.
14 Gently swirl the cuvette to mix the liquid well.
15 Insert the cuvette into the PrimeLab. Pay attention to the arrow on the front of the cuvette.
16 Tap TEST to start a 05:00 minute(s) countdown.
17 After the lapse of a 05:00 minute(s) countdown the measured value is displayed.
Notes:
The temperature of the water sample should be between 20 °C and 25 °C.
Fluorides and polyphosphates will reduce the measurement result. As long as no fluorides have
been added actively, this effect is negligible. Otherwise a result reduced by 0.01 - 0.23 mg/l is
displayed. To take this effect into account, the fluoride content must be determined in a separate
procedure. Multiply the separately measured fluoride value by 0.4 and add 1 to this result. The
factor calculated in this way must be multiplied by the measurement result (aluminium) to obtain
the actual value.Example: Determined fluoride value = 0.6 mg/l; multiplied by 0.4 = 0.24; plus 1
= 1.24 (= factor). Determined aluminium value = 0.15 mg/l; multiply by the above factor (1.24) =
0.19 mg/l aluminium concentration.
T6/204 T6/204