Millipore Spectroquant Multy Operating Manual page 187

Measuring range: 0.05 – 2.00 mg/l MBAS*
* Methylene-blue-active substances
Check the pH of the Select method 4 7 3 .
sample, specified range:
pH 5 – 10.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Shake both cells vigor- Reaction time:
ously for 30 seconds. 10 minutes
Press Enter to start
the countdown.
Release 08/2014 - Spectroquant
Surfactants (anionic)
16-mm cell
Pipette 5.0 ml of the
sample into a reaction
cell, do not mix!
Swirl both cells before
the measurement.
®
Multy
Pipette 5.0 ml of distilled
water into a second re-
action cell, close with the
screw cap, do not mix!
(Blank cell)
Insert the blank cell into
the cell compartment.
Align the mark on the
cell with that on the pho-
tometer. Press Zero .
Quality assurance:
To check the measurement system (test reagents, meas-
urement device, and handling) a surfactants standard
solution must be prepared from dodecane-1-sulfonic acid
sodium salt GR, Cat.No. 112146 (see section "Standard
solutions").
102552
Cell Test
Add to each cell 2 drops
of T-1K, close with the
screw cap.
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test .