Millipore Spectroquant Multy Operating Manual page 54

Measuring range: 4.0 – 80.0 mg/l NH
5.2 – 103.0 mg/l NH
4.0 – 80.0 mg/l NH
4.9 – 97.3 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.
Shake both cells vigor- Reaction time:
ously to dissolve the 15 minutes
solid substance. Press Enter to start
the countdown.
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 2 . Pipette 0.10 ml of the
sample into a reaction
cell, close with the
screw cap, and mix.
Insert the blank cell into
the cell compartment.
Align the mark on the
cell with that on the pho-
tometer. Press Zero .
®
Multy
Pipette 0.10 ml of
distilled water into a
second reaction cell,
close with the screw cap,
and mix.
(Blank cell)
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test .
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, 125026, and 125027.
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.
114559
Cell Test
Add to each cell 1 dose
of NH -1K using the blue
4
dose-metering cap, close
with the screw cap.
®
,
+
, can also
4