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A flow-through chemiluminescence sensor for sulfite determination

Peng Qu, Baoxin Li

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Abstract

A highly sensitive chemiluminescence (CL) sensor for the determination of sulfite combined with flow injection analysis was developed. It was based on the oxidation of sulfite by permanganate immobilized on a anion-exchange column in acidic medium with quinine as a sensitizer. The CL emission intensity was linear with sulfite concentration in the range of 1.0×10~(-7)～5.0×10~(-4) g/mL with the detection limit of 5×10~(-8) g/mL. A complete analysis, including sampling and washing, took 1 min with a relative standard deviation of 3.5%. The sensor was stable for over 200 determinations and was successfully applied to the determination of sulfite in beer samples.

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What this paper is about

A highly sensitive chemiluminescence (CL) sensor for the determination of sulfite combined with flow injection analysis was developed. It was based on the oxidation of sulfite by permanganate immobilized on a anion-exchange column in acidic medium with quinine as a sensitizer. The CL emission intensity was linear with sulfite concentration in the range of 1.0×10~(-7)～5.0×10~(-4) g/mL with the detection limit of 5×10~(-8) g/mL. A complete analysis, including sampling and washing, took 1 min with a relative standard deviation of 3.5%. The sensor was stable for over 200 determinations and was successfully applied to the determination of sulfite in beer samples.

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Available abstract

A highly sensitive chemiluminescence (CL) sensor for the determination of sulfite combined with flow injection analysis was developed. It was based on the oxidation of sulfite by permanganate immobilized on a anion-exchange column in acidic medium with quinine as a sensitizer. The CL emission intensity was linear with sulfite concentration in the range of 1.0×10~(-7)～5.0×10~(-4) g/mL with the detection limit of 5×10~(-8) g/mL. A complete analysis, including sampling and washing, took 1 min with a relative standard deviation of 3.5%. The sensor was stable for over 200 determinations and was successfully applied to the determination of sulfite in beer samples.

Key concepts: Sulfite, Chemiluminescence, Chemistry, Permanganate, Detection limit, Flow injection analysis, Relative standard deviation, Chromatography

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