Water I.D. Primelab 2.0, Manual

Page: 188 / 301

(151) Nitrogen-total LR
(all steps)
0.5 - 25.0 mg/l (N)
Reagent-Kit
Internal Name: 151-NitroTotLR-pre
40
40
60 80
100
40
30
30
20
20
20
20
10
10
0 0
°C
°F
Nitrogen LR Kit (PL151-Kit)
Measurement procedure:
1 Prepare 2 Hydroxide LR cuvettes (16 mm). Label one as a ZERO cuvette.
2 Add 1 x Persulfate powder pillow into both cuvettes.
3 Open the first cuvette (ZERO cuvette) and add 2 ml distilled water.
4 Open the second cuvette (sample cuvette) and add 2 ml sample water.
5 Screw the lid immediately back onto both cuvettes.
6 Shake the vials vigorously for 00:30 minute(s).
7 Tap TEST to start a 00:30 minute(s) countdown.
8 Place cuvettes for 30 minutes at 100 °C in the preheated thermoreactor.
9 Tap TEST to start a 30:00 minute(s) countdown.
10 CAUTION: Cuvettes are hot!
11 Remove the cuvettes from the thermoreactor.
12 Let the cuvettes cool down to at least 25 °C.
13 Add 1 x Reagent A powder pillow into both cuvettes.
14 Screw the lid immediately back onto both cuvettes.
15 Shake the vials vigorously for 00:20 minute(s).
16 Tap TEST to start a 00:20 minute(s) countdown.
17 The reagents should now react.
18 Tap TEST to start a 03:00 minute(s) countdown.
19 Add 1 x Reagent B powder pillow into both cuvettes.
20 Screw the lid back on both cuvettes.
21 Shake the vials vigorously for 00:20 minute(s).
22 Tap TEST to start a 00:20 minute(s) countdown.
23 The reagents should now react.
24 Tap TEST to start a 02:00 minute(s) countdown.
25 Open 1 Acid LR/HR cuvette and add 2 ml sample water from the previous ZERO cuvette.
This is your new ZERO cuvette.
26 Add 2 ml from the previous test cuvette into a new cuvette. This is your new test cuvette.
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