LaMotte SMART Spectro Spectrophotometer - Manual (Page 203)

NOTE: Invert slowly and completely for accurate results. Hold tubes with caps
up. Invert the tube and wait for the air bubble to fl ow to the bottom of the tube.
Turn the tube upright and wait for the air bubble to return to the top of the tube.
This is one inversion.
22. Wait 5 minutes.
23. Wipe the tubes with a damp towel to remove fi ngerprints and smudges. Wipe
with a dry towel.
24. Insert the blank tube into the chamber. Select SCAN BLANK. Remove the
blank tube from the spectrophotometer.
25. Insert the sample tube into the chamber. Select SCAN SAMPLE. Record the
result as Total Nitrogen in mg/L N.
26. Press OFF button to turn the spectrophotometer off or press EXIT button to
exit to a previous menu or make another menu selection.
NOTE: For greater accuracy, use laboratory grade pipets. To order reagent refi lls,
order code R-4026.
NITROGEN, Total SMART Spectro Test Procedures 2.11
Test P
rocedures