114552
Cell Test
Measuring 0.05 – 2.00 mg/l Cr
range: 0.11 – 4.46 mg/l CrO
4
Expression of results also possible in mmol/l.
Chromate
Determination of chromium(VI)
Add 6 drops of Cr-3K
into a reaction cell, close
with the screw cap.
Shake the cell vigorous-
ly to dissolve the solid
substance and leave to
stand for 1 minute.
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) ready-f
or-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 the
cell with the screw cap,
and mix.
Reaction time:
1 minute
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.
Release 06/2014 - Spectroquant
®
UV/VIS Spectrophotometer Pharo 300
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