A spatial hue smartphone-based colorimetric detection and discrimination of carmine and carminic acid in food products based on differential adsorptivity.

IF 5.6 1区化学 Q1 CHEMISTRY, ANALYTICAL

Talanta Pub Date : 2025-01-01 Epub Date: 2024-10-16 DOI:10.1016/j.talanta.2024.127053

Aya A Abdella, Eman A Elshenawy

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引用次数: 0

Abstract

A novel, portable, disposable, affordable, and environmentally friendly paper-based analytical device (PAD) was designed for on-site determination of carmine and carminic acid. This platform utilized paper test strips with a chitosan coating as an adsorption layer, which was characterized using scanning electron microscope, energy-dispersive X-ray analysis, and water contact angle measurement. Carmine and carminic acid could be efficiently adsorbed on chitosan-coated paper test strips, producing distinct colors that could be captured using a smartphone camera without the need for an elution step. Notably, by utilizing the Hue component of the HSL model, it was possible to differentiate between carmine and carminic acid, confirming their presence in a sample. Furthermore, the color saturation intensity changed in a concentration-dependent manner, allowing for the determination of carmine and carminic acid concentrations in the ranges of 200-800 μg/mL and 20-100 μg/mL, respectively. Additionally, the created test strip could be used to measure the percentage of carminic acid in the presence of carmine. The developed PAD enabled the quantification of carmine in various food samples without the need for reagents or complex equipment. The environmental impact of this method was found to be positive based on assessments using GAPI and AGREE tools.

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基于空间色调的智能手机比色法检测和鉴别食品中的胭脂红和胭脂虫酸，以差分吸附力为基础。

设计了一种新型、便携、一次性、经济实惠且环保的纸基分析装置（PAD），用于现场测定胭脂红和胭脂虫酸。该平台利用带有壳聚糖涂层的纸质试纸作为吸附层，并利用扫描电子显微镜、能量色散 X 射线分析和水接触角测量对其进行了表征。涂有壳聚糖的纸质试纸可以有效地吸附肉豆蔻红和肉豆蔻酸，并产生独特的颜色，使用智能手机摄像头即可捕捉到这些颜色，而无需洗脱步骤。值得注意的是，通过利用 HSL 模型的色调成分，可以区分胭脂红和胭脂虫酸，从而确认样品中是否存在这两种物质。此外，颜色饱和度的变化与浓度有关，因此可以分别测定 200-800 μg/mL 和 20-100 μg/mL 的胭脂红和胭脂虫酸浓度。此外，该试纸还可用于测量胭脂虫红存在时胭脂虫红酸的百分比。所开发的 PAD 无需试剂或复杂的设备，即可定量检测各种食品样品中的胭脂红。根据使用 GAPI 和 AGREE 工具进行的评估，发现这种方法对环境的影响是积极的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Talanta 化学-分析化学

CiteScore

12.30

自引率

4.90%

发文量

861

审稿时长

29 days

期刊介绍： Talanta provides a forum for the publication of original research papers, short communications, and critical reviews in all branches of pure and applied analytical chemistry. Papers are evaluated based on established guidelines, including the fundamental nature of the study, scientific novelty, substantial improvement or advantage over existing technology or methods, and demonstrated analytical applicability. Original research papers on fundamental studies, and on novel sensor and instrumentation developments, are encouraged. Novel or improved applications in areas such as clinical and biological chemistry, environmental analysis, geochemistry, materials science and engineering, and analytical platforms for omics development are welcome. Analytical performance of methods should be determined, including interference and matrix effects, and methods should be validated by comparison with a standard method, or analysis of a certified reference material. Simple spiking recoveries may not be sufficient. The developed method should especially comprise information on selectivity, sensitivity, detection limits, accuracy, and reliability. However, applying official validation or robustness studies to a routine method or technique does not necessarily constitute novelty. Proper statistical treatment of the data should be provided. Relevant literature should be cited, including related publications by the authors, and authors should discuss how their proposed methodology compares with previously reported methods.