PrimeLab 1.0 MULTITEST User Manual page 203

Nitrogen-Total (LR)
(151)
Measurement procedure:
The steps up to the selection of the parameter value to be determined are the same for all
procedures and described on page "TEST-5". Please observe the important notes for
accurate measurements on pages "TEST-8" and "TEST-9".
!
The individual steps of the measurement procedure are shown on the display.
Select either:
A) „All steps"
B) „Only ZERO and TEST"
A) All steps:
1) Prepare 2 cells (16mm) Hydroxide LR. Label one as zero cell.
2) Add 1 powder pillow Pers.Powd.Pack to each vial.
3) Open the first cell (zero) and fill with 2ml deionised water.
4) Open the second cell (sample) and fill with 2ml of your sample.
5) Immediately close the lid and shake vial vigorously for 00:30 minutes.
6) Press TEST to start 00:30 minutes countdown.
4
7) Put the cells for 30:00 minutes at 100°C in a preheated thermoreactor.
8) Press TEST to start the countdown.
4
9) CAUTION: cells are hot! Remove the cells from the thermoreactor and
allow to cool to 25°C or less.
10) Add 1 powder pillow Reagent A to each vial.
11) Immediately close the lid and shake vial vigorously for 00:20 minutes.
12) Press TEST to start 00:20 minutes countdown.
4
13) Proceed to next step to intitiate next countdown.
14) Reagents need to react press TEST to start 03:00 minutes countdown.
4
15) Add 1 powder pillow Reagent B to each vial.
16) Immediately close the lid and shake vial vigorously for 00:20 minutes
17) Press TEST to start 00:20 minutes countdown.
4
170
0.5 - 25 mg/l
Name on device: 151-NitroTotLR-pre
Use button 3 (arrow down) to scroll through the steps.
Use button 4 to skip the notes.
(N) 16mm vial
Hydrox. LR vial
Persulfate powder packs
Reagent A powder packs
Reagent B powder packs
Acid LR/HR vial
DI-Water
Continued...
170