LIN An-qing,YANG Bi-yun,WU Zhi-ao,WANG Bin,CHEN Shou-jian,ZHAO Fei,LIN Yuan.A Method for Identifying Adulteration in Raw Lacquer Samples Based on Infrared Spectroscopy Characteristic Peaks and Best Matching Degree Analysis[J].Journal of Instrumental Analysis,2025,44(11):2383-2390.
LIN An-qing,YANG Bi-yun,WU Zhi-ao,WANG Bin,CHEN Shou-jian,ZHAO Fei,LIN Yuan.A Method for Identifying Adulteration in Raw Lacquer Samples Based on Infrared Spectroscopy Characteristic Peaks and Best Matching Degree Analysis[J].Journal of Instrumental Analysis,2025,44(11):2383-2390. DOI: 10.12452/j.fxcsxb.25072201.
A Method for Identifying Adulteration in Raw Lacquer Samples Based on Infrared Spectroscopy Characteristic Peaks and Best Matching Degree Analysis
This study utilized infrared spectroscopy to systematically identify and analyze adulteration in raw lacquer. Authentic lacquer samples were collected from multiple production regions,and simulated adulterated samples were prepared by incorporating six common adulterants:raw tung oil,blended oil,urea,brown sugar,curing agent [isocyanate],and diluent [ethylene glycol dimethyl ether]. A comprehensive spectral database was constructed,comprising a reference infrared spectral library for pure lacquer,a quality control(QC) spectral library,and an adulterated sample retrieval library. By integrating simulated spectral computations with experimental validation of adulterant spectra,we developed a novel dual-parameter discrimination model based on optimal spectral matching degree and characteristic absorption peak analysis. Experimental results demonstrated that this method achieved high detection sensitivity(3%-10%) for five of the tested adulterants(raw tung oil,blended oil,urea,curing agent [isocyanate],and diluent [ethylene glycol dimethyl ether]),with a recognition accuracy of 92% within the corresponding adulteration range. The proposed approach provides a reliable and efficient analytical tool for quality assessment and adulteration screening of raw lacquer products. This study holds significant practical value for regulating the lacquer market and preserving the integrity of traditional lacquerware craftsmanship.
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