1.1 Methods
Phosphate, ortho
with Vario Tube Test
0.06 – 5 mg/l PO
4
Insert the adapter for 16 mm Ø vials.
1. Open the white cap of one tube PO
4
-P Dilution and
add 5 ml of the water sample.
2. Place the vial in the sample chamber making sure that
the
l
marks are aligned.
3. Press ZERO key.
4. Remove the vial from the sample chamber.
5. Add
the contents of
one VARIO Phosphate Rgt. F10
Powder Pack straight from the foil to the water sample
(Note 1).
6. Close the vial tightly with the cap and swirl several times
to mix the contents (approx. 10-15 sec., Note 2).
7. Place the vial in the sample chamber making sure that
the
l
marks are aligned.
8. 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 ortho-
Phosphate.
prepare Zero
press ZERO
Zero accepted
prepare Test
press TEST
Countdown
2:00
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