228
MD 610_2d 11/2019
Phosphate, total
with Vario Tube Test
0.02 – 1.1 mg/l P (=^0.06 – 3.5 mg/l PO
4
)
Insert the adapter for 16 mm Ø vials.
1.
Open the white cap of one
digestion tube PO4-PAcid
reagent
and add
5 ml of the water sample
.
2.
Add the contentsof
one Vario PotassiumPersulfate F10
Powder Pack
straight from the foil to the vial (Note 2).
3.
Close the vial tightly with the cap and invert several
times to mix the contents.
4.
Heat the vialsfor
30 minutes
in the preheated reactor
at a temperature
of 100°C
.
5. After 30 minutes remove the vial from the reactor.
(CAUTION: The vials are hot!)
Allow the vials to cool to room temperature.
6.
Open the cooled digestion vial and add
2 ml 1.54 N
Sodium Hydroxide Solution
to the vial.
7.
Close the vial with the cap and invert gently several
times to mix the contents.
8.
Placethe vial in the sample chamber making sure that
the
l
marks are aligned.
9.
Press
ZERO
key.
10. Removethe vial from the sample chamber.
11.
Add the contents of
one VARIO Phosphate Rgt. F10
Powder Pack
straight from the foil to the vial (Note 2).
12. Closethe vial tightly with the cap and swirl severaltimes
to mix the contents (approx. 10-15 sec., Note 3).
13. Placethe vial in the sample chamber making sure that
the
l
marks are aligned.
14. Press
TEST
key.
Wait for a
reaction period of 2 minutes
.
After the reaction period is finished the measurement
starts automatically.
The result is shown in the display in mg/l total Phosphate.
prepare Zero
press ZERO
Zero accepted
prepare Test
press TEST
Countdown
2:00
1
2
3
4
Ø 16 mm
2
6
3
Содержание Lovibond MD 610
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Страница 363: ...357 MD 610_2d 11 2019 Part 3 Enclosure...