Introduction
The CNSolution™ 9310 is an on-line cyanide analyzer designed to accurately measure available cyanide in precious metal leaching solutions, particularly in the presence of copper and metallic sulfides. It utilizes U.S. EPA Method OIA-1677 and ASTM D 6888-09, employing gas-diffusion amperometry to avoid interferences.

Challenges in Cyanide Measurement
Traditional titration methods are ineffective in estimating cyanide availability when copper is present due to complex formation. Other interfering substances include thiocyanate, nitrate, nitrite, ammonia, and sulfur oxides.

Technical Specifications

• Operating Principle: FIA by gas diffusion amperometry
• Measurement Technique: Amperometric detection with a silver electrode
• Measurement Ranges: 0.2 to 50 / 2.0 to 500 / 20 to 2000 ppm CN
• Calibration: 2-point calibration
• Measurement Accuracy: ±5% at 50 ppm
• Sample Introduction: Continuous on-line fill-and-spill sampling system
• Analysis Time: Less than 3 minutes
• Operating Environment: 5 – 45 °C, up to 90% humidity (non-condensing)
• Operator Interface: Windows® CE-based, color touch-screen display
• Power Requirements: 24VDC
• Data Export: To PC via Ethernet or USB memory stick
• Instrument Enclosure: NEMA 4X / IEC Class IP-56
• Dimensions: 48.3 cm H x 31.1 cm W x 31.1 cm D
• Weight: 11 kg (24 lbs.)

Operational Benefits
The CNSolution 9310 enables real-time monitoring, reducing cyanide consumption and operating costs in gold and silver mills. It supports multiple cyanidation unit operations, including cyanide addition, leaching, recycle, detoxification, and effluent discharge.

Data Handling
Data can be displayed in real-time on a touch-screen and exported in Microsoft® Excel®-ready .csv format. The system can integrate with SCADA for process control.

Additional Equipment
The CNSolution™ 3100 Laboratory Cyanide Analyzer is available for calibration checks and confirmatory testing using the same gas-diffusion amperometry technique.

Contact Information
OI Analytical, 151 Graham Road, PO Box 9010, College Station, Texas 77842-9010, USA. Phone: (979) 690-1711, Fax: (979) 690-0440, Email: [email protected], Website: www.oico.com