1.1 Methods
12. Close the vial tightly with the cap and swirl several times
until the tablets are dissolved.
13. Place the vial in the sample chamber making sure that
the
marks are aligned.
14. Press TEST key.
Wait for a reaction period of 10 minutes.
After the reaction period is finished the measurement
starts automatically.
The result is shown in the display in mg/l Urea.
Notes:
1. The sample temperature should be between 20°C and 30°C.
2. Carry out the test at the latest one hour after sample taking.
3. Concentrations above 2 mg/l Urea can produce results inside the measuring range.
In this case, the water sample should be diluted with Urea free water and remeasured.
4. The tablets must be added in the correct sequence.
5. The AMMONIA No. 1 tablet will only dissolve completely after the AMMONIA No. 2
tablet has been added.
6. Do not store reagent 1 (Urease) below 10°C; granulation is possible.
Store reagent 2 (Urease) in the refrigerator at a temperature of 4°C to 8°C.
7. Ammonia and chloramines are also measured during urea measurement.
8. Before analysing seawater samples, a measuring spoon of Ammonia Conditioning
Powder must be added to the sample and swirled to dissolve before AMMONIA No. 1
tablet is added.
9. Fill the vial with drops of the same size by holding the bottle vertically and squeeze
slowly.
Countdown
10:00
Zero accepted
prepare Test
press TEST
To Next Page
Loading...
