Tintometer AQUA LYTIC AL250 Instrucciones página 24

Methods
GB
Zero
Test
Ur2
0.0.0
Zero
!
Test
Ur2
RESULT
24
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.
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 21)
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
Notes: see page 22
) CO
2 2
marks
marks
AL250_Urea_2 09/2010