Rapid quantitative analysis of Hg2+ residue in dairy products using SERS coupled with ACO-BP-AdaBoost algorithm

In this study, surface-enhanced Raman spectroscopy (SERS) coupled with multivariate calibrations were employed to develop a rapid, simple and sensitive method for determination of mercury ions residues in dairy products. Initially, spherical Au@SiO2 core shell nanoparticles with highly enhancement e...

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Published inSpectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 223; p. 117281
Main Authors Li, Huanhuan, Liu, Shuangshuang, Hassan, Md Mehedi, Ali, Shujat, Ouyang, Qin, Chen, Quansheng, Wu, Xiangyang, Xu, Zhenlin
Format Journal Article
LanguageEnglish
Published Elsevier B.V 05.12.2019
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Online AccessGet full text
ISSN1386-1425
DOI10.1016/j.saa.2019.117281

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Abstract In this study, surface-enhanced Raman spectroscopy (SERS) coupled with multivariate calibrations were employed to develop a rapid, simple and sensitive method for determination of mercury ions residues in dairy products. Initially, spherical Au@SiO2 core shell nanoparticles with highly enhancement effect were synthesized to serve as the SERS substrate. Afterwards, an optical sensor system, namely micro-Raman spectroscopy system, was constructed for rapid acquisition of Au@SiO2-mercury ions spectra. Then, ant colony optimization (ACO) and genetic algorithm (GA) were applied comparatively for selecting the characteristic variables from the Savitzky Golay-First derivative (SG-FD) processing data for subsequent quantitative analysis. Eventually, both linear (PLS and SW-MLR) and nonlinear (BPANN and BP-AdaBoost) methods were used for modeling. Experimental results showed that the variables selection methods significantly improved the model performance. Especially for the ACO algorithm, and the ACO-BP-AdaBoost model achieved the best results with the higher correlation coefficient of determination (R2 = 0.997), and lower root-mean-square error of prediction (RMSEP = 0.092) than other quantification models. Paired sample t-test exhibited no statistically significant difference (sig > 0.05) between the reference concentrations determined by inductively coupled plasma mass spectrometry (ICP-MS) and the predicted concentrations by ACO-BP-AdaBoost model in adulterated foodstuffs. [Display omitted] •Micro-Raman spectroscopy system was developed for SERS spectra measurement of Hg2+.•Spherical Au@SiO2 core shell nanoparticles were synthesized to serve as the SERS substrate.•ACO-BP-AdaBoost was developed to improve the performance of modeling.•In validation analysis, the proposed method showed satisfactory results (sig > 0.05) with ICP-MS.
AbstractList In this study, surface-enhanced Raman spectroscopy (SERS) coupled with multivariate calibrations were employed to develop a rapid, simple and sensitive method for determination of mercury ions residues in dairy products. Initially, spherical Au@SiO2 core shell nanoparticles with highly enhancement effect were synthesized to serve as the SERS substrate. Afterwards, an optical sensor system, namely micro-Raman spectroscopy system, was constructed for rapid acquisition of Au@SiO2-mercury ions spectra. Then, ant colony optimization (ACO) and genetic algorithm (GA) were applied comparatively for selecting the characteristic variables from the Savitzky Golay-First derivative (SG-FD) processing data for subsequent quantitative analysis. Eventually, both linear (PLS and SW-MLR) and nonlinear (BPANN and BP-AdaBoost) methods were used for modeling. Experimental results showed that the variables selection methods significantly improved the model performance. Especially for the ACO algorithm, and the ACO-BP-AdaBoost model achieved the best results with the higher correlation coefficient of determination (R2 = 0.997), and lower root-mean-square error of prediction (RMSEP = 0.092) than other quantification models. Paired sample t-test exhibited no statistically significant difference (sig > 0.05) between the reference concentrations determined by inductively coupled plasma mass spectrometry (ICP-MS) and the predicted concentrations by ACO-BP-AdaBoost model in adulterated foodstuffs. [Display omitted] •Micro-Raman spectroscopy system was developed for SERS spectra measurement of Hg2+.•Spherical Au@SiO2 core shell nanoparticles were synthesized to serve as the SERS substrate.•ACO-BP-AdaBoost was developed to improve the performance of modeling.•In validation analysis, the proposed method showed satisfactory results (sig > 0.05) with ICP-MS.
ArticleNumber 117281
Author Ouyang, Qin
Ali, Shujat
Wu, Xiangyang
Hassan, Md Mehedi
Chen, Quansheng
Liu, Shuangshuang
Xu, Zhenlin
Li, Huanhuan
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  email: Jallent@163.com
  organization: Laboratory of Quality and Safety Risk Assessment in Agricultural Products Preservation Ministry of Agriculture, Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, People's Republic of China
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Keywords Foodstuffs
SERS
Multivariate calibration
ACO-BP-AdaBoost
Heavy metal
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Snippet In this study, surface-enhanced Raman spectroscopy (SERS) coupled with multivariate calibrations were employed to develop a rapid, simple and sensitive method...
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SubjectTerms ACO-BP-AdaBoost
Foodstuffs
Heavy metal
Multivariate calibration
SERS
Title Rapid quantitative analysis of Hg2+ residue in dairy products using SERS coupled with ACO-BP-AdaBoost algorithm
URI https://dx.doi.org/10.1016/j.saa.2019.117281
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