CNSolution specification sheet0 pages

CNSolution™
Automated Cyanide Analyzer
•tPerforms available cyanide analysis without a 2‑hour
acid distillation step using a ligand-exchange, gas
diffusion technique.
•tPerforms total cyanide analysis without a 2‑hour acid
distillation step using a UV-digestion, gas diffusion
technique.
•tRuns USEPA-approved Method OIA-1677 for available
cyanide in drinking water and wastewater.
•tSupports USEPA Method 335.4 with an optional
photometric detector and Midi-distillation system.

Description and Function

Principal Applications
•t Drinking Water
•t Wastewater
•t Surface water
•t Soil extracts
•t Industrial and Solid Waste

The CNSolution™ Cyanide Analyzer is a compact, modular system for performing
flow injection cyanide analysis on drinking water samples and wastewater samples
from mining, metal plating, and other industrial operations. The CNSolution consists
of a 90-position random access X-Y-Z autosampler, a multi-channel precision pump,
an electrically-actuated sample injection valve, a VersaChem reaction manifold, and an
amperometric detector.
The CNSolution measures available cyanide by a ligand-exchange, gas diffusion
technique coupled with high sensitivity amperometric detection in accordance with
USEPA method OIA-1677 and ASTM D6888-04.
An optional in-line UV Digestion module allows total cyanide analysis to be performed
without a separate distillation step, reducing analysis time from hours to minutes.

•t Food Safety Testing

The CNSolution can be equipped with a photometric detector for laboratories
measuring total cyanide in post-distillation samples by USEPA method 335.4. This
configuration can be supplied with a Midi-distillation system for simultaneous
distillation of up to 10 samples.

•t ASTM Aquatic Free Cyanide

Operating Principle

•t Industrial Process Solutions
•t Homeland Security

•t Combustion and Stationary
Air Sources

Methods
•t USEPA Method OIA-1677
(Available CN-/CATC/WAD)
•t ASTM Methods (D6888-04,
D7237-06, D7295-06)
•t USEPA Method 335.4
•t ISO-14403:2002
•t SW846-9010

For available cyanide measurement, samples are treated manually with ligand
exchange reagents to liberate cyanide ion (CN–). The CNSolution automatically
injects each sample into a carrier stream. Under acidic conditions, CN– converts to
HCN. HCN diffuses across a hydrophobic membrane into a basic acceptor solution,
where it converts back to CN–. CN– is then detected amperometrically in the flowcell.
WinFLOW software collects and processes the data for analysis and reporting.
For total cyanide measurement, samples pass through an in-line UV digestion module
to break down metal-cyano complexes to HCN. Cyanide ions are then detected
amperometrically in the same manner as available cyanide.
For post-distillation cyanide analysis, the CNSolution injects pretreated samples
into a carrier stream. Cyanide in the sample reacts with
color reagents under continuous flow
conditions. The photometric detector
measures the concentration of the
resulting colored complex.