Millipore Spectroquant Multy Operating Manual page 121

Measuring range: 0.10 – 1.80 mg/l F
Check the pH of the Select method 2 2 2 .
sample, specified range:
pH 3 – 8.
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 fluoride concentrations in the sample produce
brown-colored solutions (measurement solution should be
violet) and false-low readings are yielded. In such cases
the sample must be diluted (plausibility check).
Release 08/2014 - Spectroquant
Fluoride
16-mm cell
Pipette 5.0 ml of the
sample into a reaction
cell, close with the screw
cap, and mix.
Swirl both cells before
measurement.
®
Multy
Pipette 5.0 ml of distilled
water into a second
reaction cell, close with
the screw cap, and 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) ready-for-use fluoride stan-
®
dard solution Certipur , Cat.No. 119814, concentration
–
1000 mg/l F , can be used after diluting accordingly.
100809
Cell Test
Add to each cell 1 level
blue microspoon of F-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 .