Spectroquant Pharo 300 - Page 351

Nitrate
101842
Test
Pipette 10 ml of the
sample into a test tube
(Flat-bottomed tubes,
Cat.No. 114902).
Transfer the solution
(when possible without
sediment) into a corre-
sponding rectangular
cell.
Select method with
AutoSelector.
Place the cell into the
cell compartment.
Measuring 0.3 – 30.0 mg/l NO
3
-N 1.3 – 132.8 mg/l NO
3
50-mm cell
range: Expression of results also possible in mmol/l.
Reaction time:
5 minutes, measure
immediately.
Release 06/2014 - Spectroquant
®
UV/VIS Spectrophotometer Pharo 300
Shake the tube vigor-
ously for 1 minute to
dissolve the solid sub-
stance.
Check the pH of the
sample, specified range
:
pH 3 – 9.
If required, add dilute
sodium hydroxide
solution or hydrochloric
acid drop by drop to
adjust the pH.
Add 1 level blue micro-
spoon of NO
3
-1, imme-
diately close tightly with
the screw cap.
Quality assurance:
To check the measurement system (test reagents,
measurement device, and handling) a ready-f
or-use
nitrate standard solution Certipur
®
, Cat.No. 119811,
concentration 1000 mg/l NO
3
-
, can be used after diluting
accordingly.