硅钼杂多酸分光光度法测定食品中的亚硫酸盐

Biophysical Society of Guang Dong Province Academic Forum - Precise Photons and Life Health Pub Date : 2023-04-04 DOI:10.1117/12.2673903

Xin-rong Wen, C. Tu

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引用次数: 0

摘要

建立了硅钼杂多酸分光光度法测定食品中亚硫酸盐准确、简便、快速的方法。研究了硅钼杂多酸分光光度法测定亚硫酸盐的各种影响因素。在最佳反应条件下，由SiO32-和Mo7O246-生成的硅钼杂多酸[H4Si(Mo3O10)4]经亚硫酸盐还原生成硅钼蓝[H4Si(Mo3O10)2(Mo3O9)2]。在735.8 nm处测得硅钼蓝的吸光度，并根据硅钼蓝的吸光度测定亚硫酸盐的含量。该方法已应用于食品中亚硫酸盐的测定，结果令人满意。

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Spectrophotometric determination of sulfite in food by silicon molybdenum heteropoly acid

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 SiO32- and Mo7O246- 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.

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Biophysical Society of Guang Dong Province Academic Forum - Precise Photons and Life Health

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