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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 27, Number 10
BKCSDE 27(10)
October 20, 2006 

Real-time Voltammetric Assay of Cadmium Ions in Plant Tissue and Fish Brain Core
Suw Young Ly
Cadmium ion, Voltammetry, Brain, Plant, in vivo
Optimum analytical conditions for cyclic voltammetry (CV) and square wave (SW) stripping voltammetry were determined using mercury-mixed carbon nanotube paste electrode (PE). The results approached the microgram working ranges of SW: 10.0-80.0 ugL-1 and CV: 100-700 ugL-1 Cd (II); working conditions of 300-Hz frequency, 100 mV amplitude, ?1.6 V accumulation potential, 400 sec accumulation time, and 40 mV increment potential. First, analysis was performed through direct assay of cadmium ions deep into the fish’s brain core and plant tissue in real time with a preconcentration time of 400 sec. The relative standard deviation of 10.0 mgL-1 Cd (II) observed was 0.064 (n = 12) at optimum conditions. The low detection limit (S/N) was set at 0.6 ugL-1 (5.33 × 10-9 M). The methods can be used in direct analysis in vivo or in real-time monitoring of plant tissue.
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