Spectroquant Pharo 300 - Page 320

Release 06/2014 - Spectroquant
®
UV/VIS Spectrophotometer Pharo 300
Pipette 10 ml of the
sample into a reaction
cell, close with the
screw cap, and mix.
Reaction time:
2 minutes
114731
Cell Test
Measuring 2.0 – 20.0 mg/l H
2
O
2
Round cell
range: 0.25 – 5.00 mg/l H
2
O
2
50-mm cell
Expression of results also possible in mmol/l.
Hydrogen Peroxide
Place the cell into the
cell compartment. Align
the mark on the cell with
that on the photometer.
Quality assurance:
To check the measurement system (test reagents,
measurement device, and handling) a h
ydrogenperoxide
standard solution must be prepared from Perhydrol
®
30% H
2
O
2
GR, Cat.No. 107209 (see section “Standard
solutions”).
Check the pH of the
sample, specified range:
pH 0 – 10.
If required, add dilute
sulfuric acid drop by
drop to adjust the pH.
Important:
The contents of the reaction cells may be slightly yellow.
Howe
ver, this does not influence the measurement result.
Measuring range: 2.0 – 20.0 mg/l H
2
O
2
Pipette 10 ml of the
sample into a reaction
cell, close with the
screw cap, and mix.
Reaction time:
2 minutes
Check the pH of the
sample, specified range:
pH 0 – 10.
If required, add dilute
sulfuric acid drop by
drop to adjust the pH.
Measuring range: 0.25 – 5.00 mg/l H
2
O
2
Transfer the solution into
a 50-mm cell.
Place the cell into the
cell compartment.
Select method
H
2
O
2
sens in the menu
(method no. 128).