Abstract
A new fiber optical reflectance sensor for determination of heavy metal ions is described. It is based on xylenol orange which is electrostatically immobilized on an anion-exchange resin. The sensor was tested for lead ions. It is sensitive to Pb2+ ions in a concentration range from 3 × 10−6 − 3 × 10−5 M. A response time of 1.5–2 min was observed. The optrode is not fully reversible, but can be regenerated in acidic solution (pH 1).
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Klimant, I., Otto, M. A fiber optical sensor for heavy metal ions based on immobilized xylenol orange. Mikrochim Acta 108, 11–17 (1992). https://doi.org/10.1007/BF01240367
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DOI: https://doi.org/10.1007/BF01240367