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Sulfite Determination by Low Pressure Ion Chromatography with Chemiluminescence Sensitized by Hypoxzanthine

Gao Zhi-xi

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Abstract

Sulfite concentration is detected by low pressure ion chromatography (LPIC) with chemiluminescence due to thefact that hypoxanthine can sensitize the depression effect of sulfite on luminol- KMnO4 chemiluminescence reaction. The linerrange of sulfite concentration under optimal conditions is 5×10-8～4.8×10-6mol/L (r=0.9977)with a detection limit of 3.2×10-8mol/L, and RSD as 3.25% by assaying 5×10-7mol/L for five times. This simple, rapid and sensitive method is successfullyapplied to sulfite determination in food samples.

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What this paper is about

Sulfite concentration is detected by low pressure ion chromatography (LPIC) with chemiluminescence due to thefact that hypoxanthine can sensitize the depression effect of sulfite on luminol- KMnO4 chemiluminescence reaction. The linerrange of sulfite concentration under optimal conditions is 5×10-8～4.8×10-6mol/L (r=0.9977)with a detection limit of 3.2×10-8mol/L, and RSD as 3.25% by assaying 5×10-7mol/L for five times. This simple, rapid and sensitive method is successfullyapplied to sulfite determination in food samples.

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Available abstract

Sulfite concentration is detected by low pressure ion chromatography (LPIC) with chemiluminescence due to thefact that hypoxanthine can sensitize the depression effect of sulfite on luminol- KMnO4 chemiluminescence reaction. The linerrange of sulfite concentration under optimal conditions is 5×10-8～4.8×10-6mol/L (r=0.9977)with a detection limit of 3.2×10-8mol/L, and RSD as 3.25% by assaying 5×10-7mol/L for five times. This simple, rapid and sensitive method is successfullyapplied to sulfite determination in food samples.

Key concepts: Sulfite, Chemiluminescence, Detection limit, Chemistry, Chromatography, Luminol, Ion chromatography, Hypoxanthine

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