LaMotte 1200 Colorimeter - Manual (Page 59)

NITRATE - NITROGEN
3
NOTE:
11.
9. 10.
NOTE:
At the end of waiting period,
an undissolved portion of
*Nitrate Reducing Reagent
may remain in bottom of the
tube without affecting results.
Use the 0.1 g spoon
(0699) to add two
measures of *Nitrate
Reducing Reagent
(V-6279). Cap.
Hold tube by
index finger and
thumb and mix by
12.
inverting approximately
times a minute for
. Wait
for maximum
color development.
50-60
4 minutes
10
minutes
10
MINUTES
Wipe tube dry.
Align the index line with the
arrow on the meter, insert
CAL
I200
COLORIMETER
••••••••••••••••••
READ
tube into chamber.
Close the lid. Push
the
button. Record
results as ppm
Nitrate Nitrogen.
READ
To convert Nitrate Nitrogen
(NO -N) results to ppm Nitrate
(NO ), multiply by 4.4.
3
3
L Mott