Application of MIP Sensors to the Determination of Preservatives in Nonalcoholic Drinks

IF 0.9 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Inorganic Materials Pub Date : 2024-03-20 DOI:10.1134/s0020168523140078

V. H. Yen, A. N. Zyablov

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Abstract

The piezoelectric sensors modified with a molecularly imprinted polymer (MIP) with potassium sorbate (MIP-E202) and sodium benzoate (MIP-E211) imprints are tested and implemented in the determination of preservatives in soft drinks. Molecularly imprinted polymers were synthesized by noncovalent imprinting on the base of copolymer of 1,2,4,5-benzene tetracarboxylic acid dianhydride and 4,4'-diaminodiphenyl oxide in N,N-dimethylformamide (DMF) in the presence of templates. Piezoelectric sensors based on MIP and non-imprinted polymer (polyimide) were compared. High values of the imprinting factor (IF) and selectivity coefficient (k) obtained for MIP-E202 (IF = 5.4) and MIP-E211 (IF = 6.0) sensors indicated better selectivity and ability of MIP-based sensors to recognize target molecules than piezoelectric sensors modified with a reference polymer. The detectable concentrations range within 5–500 mg/L; the detection limits for potassium sorbate and sodium benzoate are 1.6 and 2.0 mg/L, respectively. The correctness of the determination of preservatives in model solutions was verified using the spike test. MIP-based sensors appeared sensitive to the determination of preservatives and insensitive to interfering substances. The matrix composition of the nonalcoholic drinks did not affect the value of the analytical signal of the piezoelectric sensor. High performance liquid chromatography (HPLC) was used as a reference method. The results of potassium sorbate and sodium benzoate determination in nonalcoholic drinks using piezoelectric sensors match the HPLC data rather well, their content in the studied soft drinks being 130–176 and 129–146 mg/L, respectively.

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应用 MIP 传感器测定非酒精饮料中的防腐剂

摘要在测定软饮料中的防腐剂时，测试并实施了用带有山梨酸钾（MIP-E202）和苯甲酸钠（MIP-E211）印迹的分子印迹聚合物（MIP）修饰的压电传感器。分子印迹聚合物是在 N,N-二甲基甲酰胺（DMF）中，以 1,2,4,5-苯四羧酸二酐和 4,4'-二氨基二苯氧化物的共聚物为基底，在模板存在的情况下，通过非共价印迹法合成的。比较了基于 MIP 和非压印聚合物（聚酰亚胺）的压电传感器。MIP-E202（IF = 5.4）和 MIP-E211（IF = 6.0）传感器的压印因子（IF）和选择性系数（k）值较高，表明基于 MIP 的传感器比用参考聚合物改性的压电传感器具有更好的选择性和识别目标分子的能力。可检测浓度范围为 5-500 mg/L；山梨酸钾和苯甲酸钠的检测限分别为 1.6 mg/L 和 2.0 mg/L。使用尖峰试验验证了模型溶液中防腐剂测定的正确性。基于 MIP 的传感器似乎对防腐剂的测定很敏感，而对干扰物质不敏感。非酒精饮料的基质成分不会影响压电传感器的分析信号值。高效液相色谱法（HPLC）被用作参照方法。使用压电传感器测定非酒精饮料中山梨酸钾和苯甲酸钠的结果与 HPLC 数据相当吻合，它们在所研究的软饮料中的含量分别为 130-176 毫克/升和 129-146 毫克/升。

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来源期刊

Inorganic Materials 工程技术-材料科学：综合

CiteScore

1.40

自引率

25.00%

发文量

审稿时长

3-6 weeks

期刊介绍： Inorganic Materials is a journal that publishes reviews and original articles devoted to chemistry, physics, and applications of various inorganic materials including high-purity substances and materials. The journal discusses phase equilibria, including P–T–X diagrams, and the fundamentals of inorganic materials science, which determines preparatory conditions for compounds of various compositions with specified deviations from stoichiometry. Inorganic Materials is a multidisciplinary journal covering all classes of inorganic materials. The journal welcomes manuscripts from all countries in the English or Russian language.