Spectrophotometric determination of sulfite in food by silicon molybdenum heteropoly acid

Xinrong Wen; Changqing Tu

doi:10.1117/12.2673903

4 April 2023 Spectrophotometric determination of sulfite in food by silicon molybdenum heteropoly acid

Xinrong Wen, Changqing Tu

Proceedings Volume 12603, Biophysical Society of GuangDong Province Academic Forum: Precise Photons and Life Health (PPLH 2022); 1260303 (2023) https://doi.org/10.1117/12.2673903
Event: 2022 Biophysical Society of Guang Dong Province Academic Forum - Precise Photons and Life Health (PPLH 2022), 2022, Guangzhou, China

Abstract

An accurate, simple, fast spectrophotometric method for the determination of sulfite in food by silicon molybdenum heteropoly acid has been established. The various effect factors on the spectrophotometric determination of sulfite by silicon molybdenum heteropoly acid are investigated in detail. Under the optimum reaction conditions, silicon molybdenum heteropoly acid [H₄Si(Mo₃O₁₀)₄] formed by SiO₃^2- and Mo₇O₂₄^6- is reduced by sulfite to form silicomolybdenum blue [H₄Si(Mo₃O₁₀)₂(Mo₃O₉)₂]. The absorbance of silicomolybdenum blue is measured at 735.8 nm, and the content of sulfite can be determined based on the absorbance of silicomolybdenum blue. This proposed method has been applied to determinate of sulfite in food, and the results are satisfactory.

Citation Download Citation

Xinrong Wen and Changqing Tu "Spectrophotometric determination of sulfite in food by silicon molybdenum heteropoly acid", Proc. SPIE 12603, Biophysical Society of GuangDong Province Academic Forum: Precise Photons and Life Health (PPLH 2022), 1260303 (4 April 2023); https://doi.org/10.1117/12.2673903

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