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Miniaturized dielectric barrier discharge-molecular emission spectrometer for determination of total sulfur dioxide in food

文献类型： 外文期刊

作者： Qian, Bing 1 ; Zhao, Jing 1 ; He, Yan 1 ; Peng, Lixu 1 ; Ge, HuiLin 1 ; Han, Bingjun 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Anal & Testing Ctr, Hainan Prov Key Lab Qual & Safety Trop Fruits & V, Haikou 571101, Hainan, Peoples R China

2.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Hainan, Peoples R China

3.Hainan Univ, Coll Forestry, Haikou 570228, Hainan, Peoples R China

4.Hainan Univ, Coll Plant Protect, Haikou 570228, Hainan, Peoples R China

关键词： Dielectric barrier discharge; Molecular emission spectrometry; SO2 determination

期刊名称：FOOD CHEMISTRY （ 影响因子：7.514； 五年影响因子：7.516 ）

ISSN： 0308-8146

年卷期： 2020 年 317 卷

页码：

收录情况： SCI

摘要： SO2 is a type of additive widely used in the food processing industry as preservative and anti-browning, bleaching, or effective antibacterial agent. However, the SO2 residue can have adverse effects on human health. In this work, a low-temperature microplasma generated by dielectric barrier discharge was used for the direct, in situ excitation of the molecular emission of SO2 in food samples. The food samples were acidified and heated to release SO2 and a miniaturized charge-coupled device spectrometer recorded the characteristic emission line at 301.9 nm. The linear correlation coefficient of the method was greater than 0.99 in the range of 10 to 100 mg L-1. Moreover, the limit of detection was 0.01 mg L-1, with recoveries between 72% and 108% and relative standard deviations of 1.5%-7.6%. The method is simple, accurate, low-cost, involves miniaturized and compact equipment and is suitable for the determination of total SO2 in food samples.

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