Release 08/2014 - Spectroquant
®
Multy
114552
Cell Test
Measuring range: 0.05 – 2.00 mg/l Cr
16-mm cell
0.11 – 4.46 mg/l CrO
4
16-mm cell
Chromate
Determination of chromium(VI)
Add 6 drops of Cr-3K
into a reaction cell, close
with the screw cap.
Shake the cell vigor-
ously to dissolve the
solid substance and
leave to stand for
1 minute.
Quality assurance:
To check the measurement system (test reagents, meas-
urement device, and handling) ready-for-use chromate
standard solution Certipur
®
, Cat.No. 119780, concen -
tration 1000 mg/l CrO
4
2–
, can be used after diluting
accordingly.
Add 5.0 ml of the sample
with pipette, close with
the screw cap, and mix.
Fill approx. 10 ml of
distilled water into an
empty 16-mm cell (do
not add any reagents!),
close with the screw
cap.
(Blank cell)
Select method 1 5 0 .
Insert the cell containing
the sample into the cell
compartment. Align the
mark on the cell with
that on the photometer.
Press Test .
Reaction time:
1 minute
Press Enter to start
the countdown.
Check the pH of the
sample, specified range:
pH 1 – 9.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Insert the blank cell into
the cell compartment.
Press Zero .