Determination of Cyanide via Amperometric Detection

AnnouncementFIA

Jul 15

FIAlab is excited to promote our methodology for determining cyanide (Free, Total, Available) through amperometric detection. Cyanide analysis has long been notorious for the use of volatile, toxic reagents (pyridine, Chloramine T) in the traditional colorimetric assay. About 25 years ago, an alternative technology was developed, based on amperometric detection, which utilizes dilute acid and base solutions as the only reagents.[1] The lack of hazardous reagents and the ease of use led to the new method gaining popularity and finally being promulgated into official USEPA, ISO, and ASTM methods. After receiving official status, amperometric CN methods have quickly become the preferred method for cyanide determination among environmental testing laboratories, mining companies, and industrial operations.

The instrument and the related methods are compliant with:

Available cyanide determination by OIA-1677-09 (EPA), 4500-CN-I (Standard Methods), 14403 (ISO) or 6888-09 (ASTM). [CN-W-4-1]
Free cyanide determination by 7237-15a (ASTM). [CN-W-4-3]
Total cyanide (fully automated) determination by D7511−12 (ASTM). This setup would require the addition of an in-line digestion module. [CN-W-4-2]
Total cyanide (semi-automated) determination in post-distillation samples by D7284 (ASTM). In this case, samples are first processed by manual batch distillation. [CN-W-4-1]