CNSolution™ 9310 Online Cyanide Analyzer

The CNSolution™ 9310 Online Cyanide Analyzer improves accuracy of cyanide detection in precious metal leaching solutions by offering a dynamic continuous-monitoring approach, significantly reducing operating costs.


The OI Analytical CNSolution™ 9310 Online Cyanide Analyzer is designed to measure available cyanide in precious metal leaching solutions by USEPA Method OIA-1677 and ASTM D 6888-09. The gas-diffusion amperometry technique in these methods has been demonstrated to be free of interferences from copper and metallic sulfides that impair the accuracy of traditional techniques such as titration.

CNSolution 9310 Online Cyanide Analyzers enable gold and silver mills to accurately measure and control cyanide levels at key points in the cyanidation process. Continuous online monitoring provides a dynamic view of the process rather than periodic snapshots obtained by grab sampling and laboratory analysis. Improved accuracy facilitates tighter control of cyanide usage and can significantly reduce a plant’s operating costs.

CNSolution™ 9310 Features:

  • Provides highly accurate measurement of available cyanide in precious metal leaching solutions
  • Uses well proven gas-diffusion amperometry technique in Methods USEPA OIA-1677 and ASTM D 6888-09
  • Analyzer measurement ranges support use throughout the cyanidation process
  • Detector response for each sample is displayed in real-time as a peak on the touch-screen display
  • Continuous monitoring improves accuracy allowing more control of cyanide usage
General Specifications
Operating Principle FIA by gas diffusion amperometry
Measurement Technique Amperometric detection – silver electrode
Measurement Ranges (ppm) 0.2 to 50 / 2.0 to 500 / 20 to 2000 ppm CN
Reference Methods USEPA OIA-1677 / ASTM D 6888-09 (Available CN)
Calibration 2 point calibration
Measurement Accuracy + 5% at 50-ppm
Sample Introduction  Continuous on-line fill-and-spill sampling system
Sampling Interval User programmable
Analysis Time <3 minutes
Operating Environment 5 – 45 °C, up to 90% humidity (non-condensing)
Operator Interface Windows® CE-based, Color touch-screen display
Reagents Required Water, NaOH, HCl, CN calibration standards
Power Requirements 24VDC
Output Relays 2 (system alarm, sample alarm)
Analog Output 2 4-20mA (user-configurable concentration)
Data Export To PC via Ethernet, or using USB memory stick
Instrument Enclosure NEMA 4X / IEC Class IP-56
External Dimensions 48.3 cm H x 31.1 cm W x 31.1 cm D
(19 &" H x 12.25 &" W x 12.25 &" D)
Weight 11 kg (24 lbs.)