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Method for identifying tobacco flavor with SERS (surface enhanced Raman spectroscopy)

A surface-enhanced Raman and tobacco flavor technology, which is applied in Raman scattering, material excitation analysis, etc., can solve the problems of cumbersome operation, unsuitable for real-time monitoring of a large number of samples, complicated preprocessing, etc., and achieves high sensitivity and non-destructive quality identification. , the effect of low detection limit

Inactive Publication Date: 2018-02-23
CHINA TOBACCO ZHEJIANG IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are not suitable for real-time monitoring of a large number of samples due to the complicated pretreatment and cumbersome operation.

Method used

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  • Method for identifying tobacco flavor with SERS (surface enhanced Raman spectroscopy)
  • Method for identifying tobacco flavor with SERS (surface enhanced Raman spectroscopy)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] 1. Instruments, reagents and instrument working conditions

[0026] 1) Instrument

[0027] Confocal Raman spectrometer (XploRA, 785 nm)

[0028] 2) Reagents

[0029] Chlorauric Acid, Sodium Citrate, Flavors and Fragrances

[0030] 3) Raman Spectroscopy Conditions

[0031] The parameters of the Raman spectrometer are set as: XploRA of HORIBA Company, light source: 785 nm; power: 1.6 mW; scanning range: 600 ~ 1500 cm -1 ; Grating: 1200 T; 10 spectra were collected for each sample, and then PCA analysis was performed with matlab software.

[0032] 2. Tobacco flavor and fragrance samples

[0033] The sample information of flavors and fragrances for tobacco is shown in the table below.

[0034] Table 1 Samples of tobacco flavors and fragrances in simulated production

[0035] serial number

sample

raw material A

raw material B

raw material C

raw material D

Solvent propylene glycol

Solvent 95% ethanol

1

1# (normal sample)...

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Abstract

The invention discloses a method for identifying tobacco flavor with SERS (surface enhanced Raman spectroscopy). 40-60 nm gold nanoparticles are prepared with a sodium citrate reduction method, and then a single-layer SERS substrate is prepared with a two-phase method and naturally dried for later use; the activity of a prepared SERS chip is determined with 4-mercaptopyridine molecules, a higher Raman signal can be obtained, and the substrate has better uniformity; the SERS chip is placed in a to-be-detected tobacco flavor sample for 1-2 h and directly detected with a Raman spectrometer afterextra flavor is removed; comparative analysis is performed on the obtained Raman spectrum with a PCA (principal component analysis) method. The sample is not required to be pretreated, no additional internal standard substance is added, the quality of the tobacco flavor in production can be identified quickly and efficiently without damage, and the method is applicable to quick online analysis ofsamples in large batches.

Description

technical field [0001] The invention belongs to the technical field of quality inspection of flavors and fragrances, and in particular relates to a method for identifying flavors and fragrances for tobacco using surface-enhanced Raman spectroscopy. Background technique [0002] Tobacco flavors and fragrances are one of the most important raw and auxiliary materials for cigarette production, and are also key auxiliary materials for cigarette process characteristics. The quality stability of tobacco flavors and fragrances is directly related to the sensory quality of cigarette products. The quality monitoring of tobacco flavors and fragrances is divided into two stages, one is the purchase and storage of commercial flavor bases, and the other is the flavors and fragrances in production, that is, the flavors and fragrances in process after secondary blending of commercial flavor bases. At present, what the industry monitors is the procurement and warehousing of flavor raw mate...

Claims

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Application Information

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IPC IPC(8): G01N21/65
Inventor 许式强张丽娜李霞许利平高阳吴兆明储国海张云莲徐清泉温宝英李剑锋陈科兵许高燕
Owner CHINA TOBACCO ZHEJIANG IND