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Characterization of Paraffin-Waxed Apples by Raman Spectroscopy
Analytical Letters ( IF 2 ) Pub Date : 2019-07-22 , DOI: 10.1080/00032719.2019.1643872
Xiaofan Du 1 , Sijia Wang 1 , Ping Wang 1 , Qing Gu 1 , Jing Xin 1 , Zhenxi Zhang 1 , Jing Wang 1 , Cuiping Yao 1
Affiliation  

Abstract Inexpensive industrial paraffin wax is often coated on the surface of apples to keep them fresh; however, this material is toxic and harmful to human health. Currently, convenient and effective methods to detect paraffin wax residues on the surface of apples are unavailable. Here a Raman spectroscopy-based technique is reported to identify industrial paraffin-waxed apples, and a quantitative detection model was established. An 8 × 8 point scan with an area of 0.16 mm2 was conducted to construct a three-dimensional map of the concentration distribution of industrial paraffin wax on the surface of waxed apples before and after washing, as well as for apple flesh 1 mm below the peel. Results demonstrated that the industrial paraffin wax did not penetrate into the flesh and that peeling the apples provides an effective means to eliminate the toxic industrial paraffin wax. This study provides a practical approach to identify fruits coated with industrial paraffin wax.

中文翻译:

用拉曼光谱表征石蜡苹果

摘要 廉价的工业石蜡常涂在苹果表面以保持新鲜;然而,这种材料是有毒的,对人体健康有害。目前还没有方便有效的方法来检测苹果表面的石蜡残留。本文报道了一种基于拉曼光谱的技术来识别工业石蜡上蜡的苹果,并建立了定量检测模型。进行面积为0.16 mm2的8×8点扫描,构建了洗前和洗后苹果表面工业石蜡浓度分布以及洗后1 mm以下苹果果肉的3D浓度分布图。剥。结果表明,工业石蜡没有渗入果肉,剥苹果皮是消除有毒工业石蜡的有效手段。这项研究提供了一种实用的方法来识别涂有工业石蜡的水果。
更新日期:2019-07-22
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