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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

An Optochemical Sensor for the Determination of Divalent Transition Metal Ions Based on a Reactive Dye

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1998, v.11 no.4, pp.305-310
Kim, Sung Bae
Lee, Hyuk Jin
Kim, Jin Mog
Shin, Doo Soon
Cha, Geun Sig
Nam, Hakhyun
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Abstract

A reactive dye synthesized with an amine containing Eriochrome Black T derivative and cynauric chloride was immobilized on a cellulose membrane to construct an optical sensor for the detection of divalent transition metal ions in aqueous solution. The response of this reactive dye-based optical sensor was as sensitive as that of Eriochrome Black T in solution phase. Its typical detection limits for <TEX>$Zn^{2+}$</TEX> and <TEX>$Co^{2+}$</TEX> were <TEX>$6.3{\times}10^{-5}mol/l$</TEX> and <TEX>$2.5{\times}10^{-4}mol/l$</TEX>, respectively. No loss in the sensitivity of reactive dye-based sensor was observed even the pH of flowing solutions continually varied for an extended period of time.

keywords
optical sensor, optode, reactive dye, cellulose membrane, Eriochrome Black T


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