Details
Nitrite Test Procedure
- TURN METER ON
Press the ZERO/ON button to power the meter on; the display will show all annunciators, then the current MENU selection, followed by the last reading. - SELECT TEST: TR7
Press and re-press the MENU button until the display shows the parameter TR7. - FILL METER WITH SAMPLE
Rinse the CELL at least 3 times with the water sample you will be testing - rinsing minimizes the potential for cross-contamination from a previous test. Finally, fill cell to capacity (4ml) with the water sample. - ZERO METER
Press the ZERO/ON button. The cursor will move across the display, followed by 100 %T. Sample is ready for testing. - DIP STRIP -(read carefully and follow procedure closely)
Dip the eXact® Strip Micro NO2, Part No. 486623 into the CELL and immediately press READ. This starts the 20 SECOND countdown timer. During this time move the strip in a gentle back and forth motion. Remove and discard the strip when the time displays 1. The cursor will move across the display, informing you that it is about to measure the sample (ignore this result). Time the reaction in the cell for four (4) minutes (timer not included). During this time, meter will shut off. When 4 minutes have elapsed, turn on the meter and wait for the last reading to be displayed and then press READ, which will start a final 20 SECOND countdown. The cursor will move across the display, informing you that it is about to measure the sample. Record result displayed (this result is automatically stored in TR7). - USE TABLE
Find the "TR7" result in the table below to determine the Nitrite concentration in ppm (parts per million). (Example: a "TR7" result of 66.3 (use only the 66 for the chart) equals a Nitrite value of 0.52 ppm). Record result. After testing is completed, rinse cell immediately.
Nitrite (NO2-2) Table
Nitrite results require the table below. Follow eXact® Micro 7+ Nitrate (NO2-2)Test Procedure (above) using eXact® Strip Micro NO3, Part No. 486623
eXact® Strip Micro NO2, Part No. 486623 - for 4mL Samples
|
%T |
9 |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
|
90 |
<0.05 |
<0.05 |
<0.05 |
<0.05 |
<0.05 |
<0.05 |
<0.05 |
<0.05 |
0.05 |
0.08 |
|
80 |
0.09 |
0.11 |
0.13 |
0.15 |
0.16 |
0.18 |
0.20 |
0.22 |
0.23 |
0.25 |
|
70 |
0.27 |
0.29 |
0.31 |
0.32 |
0.34 |
0.36 |
0.38 |
0.40 |
0.42 |
0.44 |
|
60 |
0.46 |
0.48 |
0.50 |
0.52 |
0.54 |
0.56 |
0.58 |
0.60 |
0.62 |
0.64 |
|
50 |
0.66 |
0.68 |
0.70 |
0.73 |
0.75 |
0.77 |
0.79 |
0.82 |
0.84 |
0.86 |
|
40 |
0.89 |
0.91 |
0.93 |
0.96 |
0.98 |
1.01 |
1.03 |
1.06 |
1.09 |
1.12 |
|
30 |
1.15 |
1.17 |
1.20 |
1.23 |
1.26 |
1.29 |
1.33 |
1.36 |
1.39 |
1.43 |
|
20 |
1.46 |
1.50 |
1.53 |
1.57 |
1.61 |
1.65 |
1.70 |
1.75 |
1.79 |
1.84 |
|
10 |
1.90 |
1.96 |
2.02 |
2.08 |
2.16 |
2.24 |
2.33 |
2.43 |
2.56 |
2.71 |
|
0 |
2.9 |
3.1 |
3.3 |
3.5 |
>3.5 |
>3.5 |
>3.5 |
>3.5 |
>3.5 |
>3.5 |
This table was calibrated using NO2-2 Nitrite Standards Rev. 121608 NO2
NOTE: Divide the above Nitrite result by 3.3 to determine Nitrite value as Nitrogen (NO2- as N)
© Industrial Test Systems, Inc