Spectroquant Pharo 300 - Page 354

100609
Cell Test
Nitrite
Check the pH of the
sample, specified range
:
pH 1 – 12.
If required, add dilute
sulfuric acid drop by
drop to adjust the pH.
Place the cell into the
cell compartment. Align
the mark on the cell with
that on the photometer.
Measuring 1.0 – 90.0 mg/l NO
2
-N
range: 3 – 296 mg/l NO
2
Expression of results also possible in mmol/l.
Shake the cell vigor-
ously to dissolve the sol-
id substance.
Add 2 level blue micro-
spoons of NO
2
-1K into a
reaction cell
.
Reaction time:
20 minutes, measure
immediately.
Do not shake or swirl
the cell before the mea-
surement.
Add 8.0 ml of the
sample with pipette
and
close with the
screw cap
.
Release 06/2014 - Spectroquant
®
UV/VIS Spectrophotometer Pharo 300
Quality assurance:
To check the measurement system (test reagents, meas-
urement device, and handling) ready-f
or-use nitrite stan-
dard solution Certipur
®
, Cat.No. 119899, concentration
1000 mg/l NO
2
–
, can be used after diluting accordingly as
well as the Standard solution for photometric applications,
CRM, Cat.No. 125042.