Measure chromium in waste water
CHROMIUM
In wastewater, chromium may be in either
trivalent or hexavalent form. Determination of
hexavalent chromium is a simple colorimetric
method utilizing diphenyl-carbazide as the
color forming reagent.
Metal finishing facilities and steel mills are
interested in the measurement of total
chromium because the site's NPDES discharge
permit is based on total chromium and not
hexavalent chromium.
The normal laboratory procedures for the
determination of total chromium are either
atomic absorption or oxidation of trivalent
chromium by boiling, followed by diphenylcarbazide
colorimetric determination for
hexavalent chromium.
Tytronics has developed an oxidation procedure
which uses ceric sulfate and requires no
heating. Total analysis time is less than 15
minutes. Full scale concentration ranges as low
as 0-0.2 ppm have been measured as well as the
0-10 ppm range.
TYTRONICS'® SENTINEL
Tytronics’ Sentinel is an on-line colorimetric
analyzer. The instrument uses a batch sampling
technique that allows the use of 0.25" tubing for
sample lines so small amounts of solids will not
affect instrument performance. Other advantages
of batch sampling are:
analytical results are not affected by sample
and reagent flows
analyses are only performed as frequently as
required, minimizing reagent consumption
METHOD OF ANALYSIS
The analysis requires two reagents; reagent 1 is
the oxidizing solution and reagent 2 is the color
forming solution.
Features:
Provides continuous on-line analysis of water
or wastewater stream
Ease of maintenance, rugged design
Self-checking for easy diagnostics
Minimizes sampling requirements
Multiple communication ports, including
bi-directional RS 232
Enhanced Features of Tytronics’ Sentinel:
Programmable from 1 to 10 methods for a
single analysis compound
Up to 3 different calibration methods
Eight relay outputs, multi-programmable on
each relay
Alarm functions, including sample flow,
reagent level detection
From 1 to 6 stream configurations
Use our Tytronics Sentinel for measuring chromium in waste water
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