Millipore Spectroquant Multy Operating Manual page 56

Measuring range: 1.0 – 50.0 mg/l NH
1.3 – 64.4 mg/l NH
1.0 – 50.0 mg/l NH
1.2 – 60.8 mg/l NH
Check the pH of the Select method
sample, specified range:
pH 4 – 13.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Add to each cell 1 level Shake both cells vigor-
blue microspoon of ously to dissolve the
NH -2, close with the solid substance.
4
screw cap.
Important:
Very high ammonium concentrations in the sample
produce turquoise-colored solutions (measurement solu-
tion should be yellow-green to green) and false-low read-
ings are yielded. In such cases the sample must be di-
luted (plausibility check).
Release 08/2014 - Spectroquant
Ammonium
-N 16-mm cell
4
16-mm cell
4
-N 16-mm cell
3
16-mm cell
3
3 4 . Pipette 5.0 ml each of
NH -1 into two 16-mm
4
cells.
Reaction time:
15 minutes
Press Enter to start
the countdown.
®
Multy
Add to one cell 0.20 ml
of the sample with pipet-
te, close with the screw
cap, and mix.
Insert the blank cell into
the cell compartment.
Press Zero .
Quality assurance:
To check the measurement system (test reagents, meas-
urement device, and handling) we recommended to use
®
Spectroquant CombiCheck 70, Cat.No. 114689, or the
Standard solution for photometric applications, CRM,
Cat.No. 125025 and 125026.
Ready-for-use ammonium standard solution Certipur
Cat.No. 119812, concentration 1000 mg/l NH
be used after diluting accordingly.
To check for sample-dependent effects the use of addition
solutions (e.g. in CombiCheck 70) is highly recommended.
100683
Test
Add to the second cell
0.20 ml of distilled water
with pipette, close with
the screw cap, and mix.
(Blank cell)
Insert the cell containing
the sample into the cell
compartment. Press
Test .
®
,
+
, can also
4