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Determination of Lead Ions by an Optical Sensor Based on 2-Amino-Cyclopentene-1-Dithiocarboxylic Acid

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2 Author(s)
Ensafi, A.A. ; Isfahan Univ. of Technol., Isfahan ; Isfahani, Z.N.

A new spectrophotometric sensor for the determination of lead at trace level was developed using chemically immobilized 2-amino-cyclopentene-l-dithiocarboxylic acid (ACDA) on a triacetylcellulose. The sensor provided a wide concentration range of 1.0 x 10-6 to 5.0 x 10-1 M Pb(II) with a limit of detection of 6.9 X 10-7 M Pb(II). The method also showed a reproducible result with relative standard deviation of less than 3.5% and response time of the optode was 10 min. Interference studies showed that Co(II) and Ni(II) ions interfered during the determination. The interference of potential interfering ions could be eliminated using a simple extraction procedure. The method was successfully used to determination of Pb(II) ions in reference alloy, water, and waste water samples with satisfactory results.

Published in:

Sensors Journal, IEEE  (Volume:7 ,  Issue: 8 )

Date of Publication:

Aug. 2007

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