Water I.D. Primelab 2.0, Manual

Page: 189 / 301

27 Screw the lid back on both cuvettes.
28 Gently swirl both cuvettes to mix the liquids well. Caution, heat development!
29 Place the 16 mm adapter in the PrimeLab.
30 Place the ZERO cuvette in the PrimeLab.
31 Put on the lightshield.
32 Start ZERO measurement.
33 Remove the cuvette again.
34 Insert the sample cuvette in the PrimeLab.
35 Put on the lightshield.
36 Tap TEST to perform the measurement.
37 The measured value is immediately displayed.
Notes:
If you intend to use last ZERO, please ignore steps where you are asked to prepare a ZERO
vial.
The test result can be converted into the following unit(s): mg/l NH₃, mg/l NH₄⁺.
This test can be used for water, wastewater and seawater.
Remove powder from vial edges, lid and tube threads after adding powder.
Use volumetric pipettes to dose exactly 2 ml of the Acid LR/HR reagent.
Reagents might not dissolve entirely.
Incubation time shall NOT exceed 30 minutes!
Step 28 to be performed by turning vial upside down and back, waiting for the solution to
entirely flow down. Inverse 10 times.
Zero vial can be stored and used for max. 7 days if stored in the dark
Dilute and repeat measurement if large quantities of nitrogen compounds (free, organic) are
present, as they may interfere and reduce the effectiveness of the digestion.
Bromide concentrations > 60 mg/l and chloride concentrations > 1000 mg/l interfere and lead to
results increased by 10 %.
T134/204 T134/204