Millipore Spectroquant Multy Operating Manual page 55

Measuring range: 0.02 – 1.30 mg/l NH
0.03 – 1.67 mg/l NH
0.02 – 1.30 mg/l NH
0.02 – 1.64 mg/l NH
Attention: In contrast to the instructions given in the package insert the sample volume as well as the reagent volume
must be doubled.
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 test tube Shake both test tubes
2 level blue microspoons vigorously to dissolve
of NH -2. the solid substance.
4
Transfer each solution Insert the blank cell into
into a separate 24-mm the cell compartment.
cell, close with the screw Align the mark on the
caps. cell with that on the pho-
tometer. Press Zero .
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 24-mm cell
4
24-mm cell
4
-N 24-mm cell
3
24-mm cell
3
3 3 . Pipette 10 ml of the
sample into a test tube.
Reaction time:
5 minutes
Press Enter to start
the countdown.
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test .
®
Multy
Pipette 10 ml of distilled Add to each test tube
water into a second test 1.2 ml of NH
tube. pette and mix.
(Blank)
Add to each test tube Reaction time:
8 drops of NH -3 and 5 minutes
4
mix. Press Enter to start
the countdown.
Quality assurance:
To check the measurement system (test re-
agents, measurement device, and handling)
we recommended to use Spectroquant
CombiCheck 50, Cat.No. 114695, or the Stan-
dard solution for photometric applications,
CRM, Cat.No. 125022 and 125023.
Use 10 ml R-1 instead of the sample.
Ready-for-use ammonium standard solution
®
Certipur , Cat.No. 119812, concentration
+
1000 mg/l NH , can also be used after diluting
4
accordingly.
To check for sample-dependent effects the use
of addition solutions (e.g. in CombiCheck 50) is
highly recommended.
Use 10 ml sample + 0.1 ml R-2.
114752
Test
-1 with pi-
4
®