Chromium (VI) 0 to 5 ppm
CHROMIUM (VI)
Although chromium exists in two valence
states, III and IV, it is the chromium VI
which is the predominant pollutant of
interest. The requirement to ensure that
chromium is not being discharged into
effluent water streams is of great importance
in the plating industry.
Other industries using chromium products
and chromium based catalysts are also faced
with the same problem. These include metal
pickling, anodizing of aluminum, in the
leather industry (where chromium is used as
tanning agent) and in the manufacture of
paints, dyes, explosives and ceramics.
Chromium (VI) is readily measured in the
laboratory using the APHA Standard
Method which involves the reaction of
diphenylcarbazide to form a violet colored
complex which exhibits a characteristic
absorption spectrum.
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
an acid buffer/dilution water while 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 water
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