Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, 09001 Burgos, Spain.
Direction Générale, La Jasse de Maurin, Groupe ICV, 34970 Lattes, France.
ACS Appl Mater Interfaces. 2023 Mar 29;15(12):16055-16062. doi: 10.1021/acsami.3c00395. Epub 2023 Mar 20.
Quality control in the food industry is of the upmost importance from the food safety, organoleptic and commercial viewpoints. Accordingly, the development of , rapid, and costless analytical tools is a valuable task in which we are working. Regarding this point, the copper content of grape must has to be determined by wineries along the wine production process. For this purpose, grape must samples are sent to laboratories where the copper content is measured usually by flame atomic absorption spectrometry or by inductively coupled plasma mass spectrometry. We herein propose a straightforward, rapid, and inexpensive methodology based both on a film-shaped colorimetric polymer sensor and a smartphone method that at the same time can be used by unskilled personnel. The sensory polymer films change their color upon dipping them on the grape must, and the color evolution is analyzed using the digital color parameters of a picture taken to the film with a smartphone. Furthermore, the analytical procedure is automatically carried out by a smartphone app. The limit of detection of copper of the polymer sensor is 0.08 ppm. Following this approach, 18 production samples coming from the French Groupe ICV company were studied. The copper content of the samples was analyzed by the usual procedure carried out by the company (flame atomic absorption spectrometry) and by the method proposed in this work, ranging this content from 0.41 to 6.08 ppm. The statistical study showed that the results of both methods are fully consistent, showing the validity of the proposed method for the determination of copper in grape must within the frame of wine production wineries and industries.
从食品安全、感官和商业角度来看，食品工业中的质量控制是至关重要的。因此，开发快速、廉价的分析工具是一项有价值的任务，我们正在为此努力。关于这一点，葡萄酒生产过程中，各个酒厂都必须测定葡萄汁中的铜含量。为此，酒厂会将葡萄汁样本送到实验室，通常采用火焰原子吸收光谱法或电感耦合等离子体质谱法来测量铜含量。在此，我们提出了一种简单、快速且廉价的方法，该方法基于薄膜比色聚合物传感器和智能手机，同时可以由非专业人员使用。感官聚合物薄膜在浸入葡萄汁后会改变颜色，并且可以使用智能手机拍摄的薄膜的数字颜色参数来分析颜色演变。此外，分析过程由智能手机应用程序自动进行。聚合物传感器对铜的检测限为 0.08ppm。采用这种方法，对来自法国 ICV 集团的 18 个生产样品进行了研究。样品的铜含量由公司（火焰原子吸收光谱法）通常进行的程序和本工作中提出的方法进行分析，铜含量范围为 0.41 至 6.08ppm。统计研究表明，两种方法的结果完全一致，表明该方法可用于在葡萄酒生产酒厂和行业中测定葡萄汁中的铜。
