Mg/L - Aqualytic AL100 Mode D'emploi

Methods
GB
Ur2
Zero
Test
Ur2
0.0.0
! Zero
Test
Ur2
RESULT
28
Urea
with Tablet and Liquid Reagent
0.2 – 5 mg/l (NH
Fill a clean vial (24 mm Ø) with 5 ml of the water sample and 5 ml
deionised water, close tightly with the cap.
Place the vial in the sample chamber making sure that the
are aligned.
Press the [ZERO/TEST] key.
The method symbol flashes for approx. 8 seconds.
Remove the vial from the sample chamber.
In the presence of free Chlorine (HOCl), add one UREA PRETREAT
tablet straight from the foil and crush the tablet using a clean stirring
rod (Note 10).
Close the vial tightly with the cap and swirl several times to mix the
contents.
Fill the prepared vial with drops of the same size by holding the bottle
vertically and squeeze slowly:
2 drops of UREA Reagent 1
Close the vial tightly with the cap and invert several times to mix the
contents.
Add 1 drop of UREA Reagent 2 (Urease) to the same water sample.
Close the vial tightly with the cap and invert several times to mix the
contents.
Wait for a reaction period of 5 minutes.
Add one AMMONIA No. 1 tablet straight from the foil to the pre-
pared water sample and crush the tablet using a clean stirring rod.
Add one AMMONIA No. 2 tablet straight from the foil to the same
water sample and crush the tablet using a clean stirring rod.
Close the vial tightly with the cap and swirl gently several times until
the tablets are dissolved.
Place the vial in the sample chamber making sure that the
are aligned.
Wait for a reaction period of 10 minutes.
(Countdown can be activated, see page 25)
The method symbol flashes for approx. 3 seconds.
The result is shown in the display in mg/l Urea.
Tolerances: ± 0.4 mg/l Urea
) CO
2 2
marks
marks
AL100_7a 05/2019