Rapid flow injection method for the determination of sulfite in wine using the permanganate-luminol luminescence system.
A simple, rapid and sensitive chemiluminescence method for the determination of sulfite has been developed by combining flow-injection analysis and its sensitizing effect on the known chemiluminescence emission produced by the oxidation of luminol in alkaline medium; in this work permanganate has been proposed as oxidizing reactive. The optimum conditions for the chemiluminescence emission were established. The chemiluminescence was proportional to the sulfite concentration over the range 1.6 × 10(-5) and 4.0 × 10(-4)mol L(-1). The detection limit was 4.7 × 10(-6)mol L(-1) of sulfite. The method has been satisfactorily used for the determination of free and bound sulfite in wines.
Navarrro
Mercedes Villar
MV
Department of Analytical Chemistry, Faculty of Chemistry, University of Seville, c/Prof. García González s/n, 4012 Seville, Spain.
Payán
María Ramos
MR
López
Miguel Angel Bello
MA
Fernández-Torres
Rut
R
Mochón
Manuel Callejón
MC
D017022:Flow Injection Analysis / Q000379:methods*; D057230:Limit of Detection; D049408:Luminescent Agents / Q000737:chemistry*; D008163:Luminescent Measurements; D008165:Luminol / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D013447:Sulfites / Q000032:analysis*; D013997:Time Factors; D014920:Wine / Q000032:analysis*
D049408:Luminescent Agents; D017895:Manganese Compounds; D010087:Oxides; D013447:Sulfites; C048856:permanganic acid; D008165:Luminol