GB
Methods
RESULT
Triazole with VARIO Powder Pack
1 – 16 mg/l Benzotriazole
Transfer 25 ml of the water sample into the digestion vial.
Add the contents of one VARIO Triazole Rgt F25 Powder Pack
straight from the foil into the water sample
(note
1
)
.
Close the digestion vial tightly with the cap and swirl until the reagent
is dissolved completely.
Insert the UV lamp into the digestion vial (notes
1, 2
).
CAUTION: Wear UV safety goggles
!
Switch the UV lamp on.
Wait for a reaction period of 5 minutes (notes 9, 10).
After the reaction period is finished proceed as follows:
Switch the UV lamp off and remove the lamp from the vial.
Invert several times to mix the contents.
Fill a clean vial (24 mm Ø) with 10 ml deionised water and perform
zero calibration (see “Operation”).
Remove the vial from the sample chamber and empty the vial.
Add the digested water sample to the 10 ml mark.
Place the vial in the sample chamber making sure that the
marks
are aligned.
Press the [ZERO/TEST] key.
The method symbol flashes for approx. 3 seconds.
The result is shown in the display in mg/l Benzotriazole (note 3).
0.0.0
Zero
Test
tri
tri
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