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MD 610_2d 11/2019
13. Add
one AMMONIA No. 2 tablet
straight from the
foil to the same water sample and mix to dissolvewith
a clean stirring rod.
14. Closethe vial tightly with the cap and swirl severaltimes
until the tablets are dissolved.
15. Placethe vial in the sample chamber making sure that
the
marks are aligned.
16. 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 dissolvecompletely 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.
10. One UREAPRETREATtabletcompensates for the interference of free Chlorine
up to 2 mg/l (two tablets up to 4 mg/l, three tablets up to 6 mg/l).
Reagent
Form of reagent/Quantity
Order-No.
UREA PRETREAT
Tablet / 100
516110BT
UREAReagent 1
Liquid reagent / 15 ml
459300
UREAReagent 2
Liquid reagent / 10 ml
459400
Set
AMMONIA No. 1 / No. 2
Tablet / per 100
inclusive stirring rod
517611BT
AMMONIA No. 1
Tablet / 100
512580BT
AMMONIA No. 2
Tablet / 100
512590BT
Countdown
10:00
Zero accepted
prepare Test
press TEST
Содержание Lovibond MD 610
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Страница 279: ...273 MD 610_2d 11 2019 Notes 1 SO3 Na2 SO3 Reagent Formof reagent Quantity Order No SULFITE LR Tablet 100 518020BT...
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