Palacios-Jordan Héctor, Jané-Brunet Anna, Jané-Brunet Eduard, Puiggròs Francesc, Canela Núria, Rodríguez Miguel A
Eurecat, Centre Tecnològic de Catalunya, Centre for Omic Sciences (COS), Joint Unit URV-EURECAT, Unique Scientific and Technical Infrastructures (ICTS), 43204 Reus, Spain.
LLUIS JANE BUSQUETS (LJB) Analysis Laboratory S.L., Sant Quirze del Vallés, 08192 Barcelona, Spain.
Foods. 2022 Jan 22;11(3):297. doi: 10.3390/foods11030297.
Food additives are in widespread use in the food industry to extend the shelf life of food, improve its organoleptic characteristics or facilitate industrial processing. Their use is not without controversy, which makes regulation and control crucial for food safety and public health. Among food additives, silicone-based antifoaming agents (polysiloxanes or E900) are difficult to analyze and quantify due to their polymeric nature. Currently, there is no official method of quantifying this additive in foods. In this context, nuclear magnetic resonance (NMR) is a quantitative method for speciation analysis of silicon compounds almost without known interferents. In this work, we describe the evolution of the regulation of the E900 additive, discuss different analytic methods quantifying polydimethylsiloxanes (PDMS), and propose a new method based on NMR suitable for analyzing the content of E900 in the form of PDMS in various types of food from dietary oils to marmalades and jellies, among others. The proposed method consists of a previous quantitative concentration of PDMS by liquid-liquid extraction and the monitoring of the quantification using a bis(trimethylsilyl)benzene (BTMSB) standard to control the variability, ranging within 2-7%, depending on the food. This simple, direct, and reproducible procedure for aqueous and lipidic foods may help to monitor and fill a gap in regulatory legislation regarding the E900 additive.
食品添加剂在食品工业中广泛使用，以延长食品的保质期、改善其感官特性或促进工业加工。它们的使用并非没有争议，这使得监管和控制对食品安全和公众健康至关重要。在食品添加剂中，有机硅消泡剂（聚硅氧烷或E900）由于其聚合物性质而难以分析和定量。目前，尚无官方方法对食品中的这种添加剂进行定量。在此背景下，核磁共振（NMR）是一种几乎没有已知干扰物的硅化合物形态分析定量方法。在这项工作中，我们描述了E900添加剂监管的演变，讨论了定量聚二甲基硅氧烷（PDMS）的不同分析方法，并提出了一种基于NMR的新方法，适用于分析从食用油到果酱和果冻等各类食品中以PDMS形式存在的E900含量。所提出的方法包括通过液液萃取对PDMS进行预先定量浓缩，并使用双（三甲基硅基）苯（BTMSB）标准物监测定量，以控制变异性，根据食品不同，变异性在2%至7%范围内。这种针对水性和脂质食品的简单、直接且可重复的程序可能有助于监测并填补关于E900添加剂监管立法的空白。
