基于紫外-可见分光光度法测定食品接触橡胶中高锰酸钾消耗量

doi:10.7506/spkx1002-6630-20220114-133

食品科学 ›› 2022, Vol. 43 ›› Issue (22): 334-340.doi: 10.7506/spkx1002-6630-20220114-133

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基于紫外-可见分光光度法测定食品接触橡胶中高锰酸钾消耗量

曾少甫，郭盼，章凯倩，胡长鹰，刘宜奇，王志伟

（1.暨南大学包装工程学院，广东省普通高校产品包装与物流重点实验室，广东珠海 519070；2.暨南大学力学与建筑工程学院，广东广州 510632；3.暨南大学理工学院，广东广州 510632）

发布日期:2022-12-12
基金资助:
“十三五”国家重点研发计划重点专项（2018YFC1603205）；国家自然科学基金国际（地区）合作交流项目（32061160474）

Optimization and Validation of Ultraviolet-Visible Spectrophotometric Method for Determination of Potassium Permanganate Consumption for Migrants from Food Contact Rubber

ZENG Shaofu, GUO Pan, ZHANG Kaiqian, HU Changying, LIU Yiqi, WANG Zhiwei

(1. Key Laboratory of Product Packaging and Logistics of Guangdong Higher Education Institutes, College of Packaging Engineering, Jinan University, Zhuhai 519070, China;2. School of Mechanics and Construction Engineering, Jinan University, Guangzhou 510632, China;3. College of Science and Engineering, Jinan University, Guangzhou 510632, China)

Published:2022-12-12

摘要/Abstract

摘要： 建立紫外-可见分光光度法测定食品接触橡胶中KMnO4消耗量的分析方法。对反应时间、加入H2SO4浓度和KMnO4浓度进行优化，以获得建立方法的最佳条件，并进行方法学分析。结果表明，在高锰酸钾消耗量为1 mg/kg的水迁移液中H2SO4和KMnO4的浓度应分别超过0.1 mol/L和0.005 74 mmol/L，以反应时间6 min，吸收波长525 nm，KMnO4标准溶液在0.014～0.280 mmol/L范围内线性良好，相关系数（R2）为0.998 91。检出限和定量限分别为6.8×10－4 mmol/和2.0×10－3 mmol/L。通过F检验和t检验比较，本方法与国标方法无显著差异，相对标准偏差在1.7%～7.8%之间。本方法可用于质量控制中食品接触橡胶的KMnO4消耗分析。

关键词: 紫外-可见光分光光度法；食品接触橡胶；KMnO4消耗量；优化与方法验证

Abstract: An analytical method for the determination of manganese dioxide (KMnO4) consumption for migrants from food contact rubber by ultraviolet-visible (UV-Vis) spectrophotometry was established. The reaction time, and the concentration of sulfuric acid (H2SO4) and KMnO4 were optimized, and the analytical figures of merit of the method were evaluated. Results showed that the concentrations of H2SO4 and KMnO4 in migrant aqueous solution with KMnO4 consumption of 1 mg/kg should exceed 0.1 and 0.005 74 mmol/L, respectively, and the optimal reaction time was 6 min. The detection wavelength was set at 525 nm. The KMnO4 standard solution exhibited good linearity in the range of 0.014–0.280 mmol/L, with a correlation coefficient (R2) of 0.998 91. The limit of detection (LOD) and limit of quantification (LOQ) were found to be 6.8 × 10-4 and 2.0 × 10-3 mmol/L, respectively. F test and t test showed that the results of this method were not significantly different from those of the official redox titration method, and the relative standard deviation (RSD) was between 1.7% and 7.8%. The proposed method is useful for the analysis of KMnO4 consumption for migrants from food contact rubber in food quality control.

Key words: ultraviolet-visible spectrophotometry; food contact rubber; manganese dioxide consumption; optimization and method validation

中图分类号:

TS207.3

曾少甫，郭盼，章凯倩，胡长鹰，刘宜奇，王志伟. 基于紫外-可见分光光度法测定食品接触橡胶中高锰酸钾消耗量[J]. 食品科学, 2022, 43(22): 334-340.

ZENG Shaofu, GUO Pan, ZHANG Kaiqian, HU Changying, LIU Yiqi, WANG Zhiwei. Optimization and Validation of Ultraviolet-Visible Spectrophotometric Method for Determination of Potassium Permanganate Consumption for Migrants from Food Contact Rubber[J]. FOOD SCIENCE, 2022, 43(22): 334-340.

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基于紫外-可见分光光度法测定食品接触橡胶中高锰酸钾消耗量

Optimization and Validation of Ultraviolet-Visible Spectrophotometric Method for Determination of Potassium Permanganate Consumption for Migrants from Food Contact Rubber

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