Spectrophotometric determination of aqueous cyanide using a revised phenolphthalin method.
This paper focuses on a revision of the phenolphthalin method for cyanide analysis, with the intent of producing a robust and sensitive spectrophotometric method. Limitations of the phenolphthalin chemistry were overcome by the addition of EDTA to the reagent. The revised reagent was found to have suitably fast kinetics, a linear dynamic range of 0.01-3.0 ppm cyanide, and a detection limit of 5 ppb. The method was tested for interferences and applied to the determination of cyanide in environmental waters.
Cacace
David
D
Department of Chemistry and Physics, University of North Florida, Jacksonville, FL 32224, USA.
Ashbaugh
Heidi
H
Kouri
Naomi
N
Bledsoe
Sara
S
Lancaster
Sean
S
Chalk
Stuart
S