Quantitative Research on Hazelnut Oil Adulteration Based on Laser Raman Spectroscopy

Fengjuan Zhang; Min Huang

doi:10.3788/LOP232229

Laser & Optoelectronics Progress, Volume. 61, Issue 13, 1330001(2024)

Quantitative Research on Hazelnut Oil Adulteration Based on Laser Raman Spectroscopy

Fengjuan Zhang^1、* and Min Huang²

Author Affiliations

¹Institute of Integrated Circuits, Wuxi Professional College of Science and Technology, Wuxi 214028, Jiangsu , China

²Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education), Jiangnan University, Wuxi 214122, Jiangsu , China

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Abstract Get PDF(in Chinese)

Figures & Tables(8)

Fig. 1. Raman average spectra of four edible oils. (a) Original spectra; (b) processed spectra; (c) at 1261 cm^-1; (d) at 1652 cm^-1

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Fig. 2. Normalized Raman spectra of hazelnut oil adulterated with different types and mass percentages of adulterated oil. (a) Adulterated with corn oil; (b) adulterated with walnut oil; (c) adulterated with flaxseed oil

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Fig. 3. Enlarged distribution charts of Raman peak at 1261 cm^-1. (a) Adulterated with corn oil; (b) adulterated with walnut oil;(c) adulterated with flaxseed oil

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Fig. 4. PCA scatter diagrams of hazelnut oil adulterated with different oils. (a) Adulterated with corn oil; (b) adulterated with walnut oil;(c) adulterated with flaxseed oil

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Fig. 5. PLS diagrams of hazelnut oil adulterated with different oils. (a) Adulterated with corn oil; (b) adulterated with walnut oil; (c) adulterated with flaxseed oil

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Table 1. Information of edible oil samples

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Table 1. Information of edible oil samples

No.	Kind	Brand information
1	Hazelnut oil	Roland hazelnut oil
2	Hazelnut oil	Alimentari hazelnut oil
3	Walnut oil	Engnice walnut oil
4	Walnut oil	Roland walnut oil
5	Walnut oil	Chugu walnut oil
6	Corn oil	Knife corn oil
7	Corn oil	Golden Dagon Fish corn oil
8	Corn oil	Mighty corn oil
9	Flaxseed oil	Somia flaxseed oi
10	Flaxseed oil	Greeno flaxseed oil
11	Flaxseed oil	Nutriville flaxseed oil

Table 2. Raman spectrum characteristic peaks in 1000‒1800 cm^-1 of edible oil

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Table 2. Raman spectrum characteristic peaks in 1000‒1800 cm^-1 of edible oil

Band /cm^-1	Vibration mode	Molecule/group
1081	ν（C—C）	—（CH₂）_n—
1261	δ_p（=C—H）	Unconjugated （cis RHC=CHR）
1300	δ_τ （C—H）	Methylene （CH₂）
1442	δ_γ （C—H）	Methylene （CH₂）
1652	ν（C==C）	Unsaturated banding （cis RHC=CHR）
1742	ν（C== O）	Ester（RC=OOR）

Table 3. PLS model parameters of three pseudo oil samples
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Table 3. PLS model parameters of three pseudo oil samples
Adulterated oil RP RMSEC RMSEP RPD
Core oil 0.9688 0.0121 0.0190 5.662
Walnut oil 0.9872 0.0098 0.0126 8.848
Flaxseed oil 0.9894 0.0037 0.0114 9.707

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Fengjuan Zhang, Min Huang. Quantitative Research on Hazelnut Oil Adulteration Based on Laser Raman Spectroscopy[J]. Laser & Optoelectronics Progress, 2024, 61(13): 1330001

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