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Flow-Through Bulk Optode for the Spectrophotometric Determination of Perchlorate

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Abstract.

 A flow-through spectrophotometric bulk optode for the flow-injection determination of perchlorate is described. As active constituents, the optode incorporates the lipophilic pH indicator 5-octadecanoyloxy-2-(4-nitrophenylazo) phenol and methyltridodecyl ammonium chloride, dissolved in a plasticized poly(vinyl chloride) membrane which is entrapped in a cellulose support. The optode is applied in conjunction with the flow injection technique at pH 8.2 (TRIS buffer). The sensor is readily regenerated with a 10−2 M NaOH carrier solution. The analytical characteristics of this optode with respect to response time, dynamic measurement range, reproducibility and selectivity are discussed. The proposed FI method is applied to the determination of perchlorate in waters from different sources.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, 30071 Murcia, Spain, , , , , , ES

    Soledad García, Isabel Albero, Joaquín A. Ortuño, Concepción Sánchez-Pedreño & Rosario Expósito

Authors
  1. Soledad García
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  2. Isabel Albero
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  3. Joaquín A. Ortuño
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  4. Concepción Sánchez-Pedreño
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  5. Rosario Expósito
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Corresponding author

Correspondence to Concepción Sánchez-Pedreño.

Additional information

Received December 16, 2002; accepted May 16, 2003 Published online August 8, 2003

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García, S., Albero, I., Ortuño, J. et al. Flow-Through Bulk Optode for the Spectrophotometric Determination of Perchlorate. Microchim. Acta 143, 59–63 (2003). https://doi.org/10.1007/s00604-003-0040-2

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  • DOI: https://doi.org/10.1007/s00604-003-0040-2

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