Surface enhanced Raman spectroscopy detection method for total arsenic content in food

A surface-enhanced Raman and spectral detection technology, which is applied in Raman scattering, measuring devices, and material analysis through optical means, can solve problems such as slow detection speed, matrix interference, and cumbersome processing steps, and achieve high accuracy. The effect of intelligent detection

Pending Publication Date: 2021-05-14
JIANGSU UNIV
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Problems solved by technology

The invention overcomes the problems of slow conventional physical and chemical detection speed, cumbersome sample pretreatment steps, and easy matrix interference, and significantly improves the detection speed and reliability of the total arsenic content in food

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  • Surface enhanced Raman spectroscopy detection method for total arsenic content in food
  • Surface enhanced Raman spectroscopy detection method for total arsenic content in food
  • Surface enhanced Raman spectroscopy detection method for total arsenic content in food

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[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] Such as figure 1 As shown, a surface-enhanced Raman spectroscopy method for the detection of total arsenic in food, firstly, cube-shaped Cu with a large specific surface area was synthesized 2 O nanoparticles (Cu 2 O NPs), in order to improve the SERS enhancement and the stability of the nanoparticles, an excess of AgNO 3 Add the synthesized Cu 2 O, then tris...

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Abstract

The invention provides a surface enhanced Raman spectroscopy detection method for total arsenic content in food. The surface enhanced Raman spectroscopy detection method comprises the following steps of: preparing Cu2O nanoparticles; synthesizing Cu2O / Ag nanoparticles; establishing a total arsenic content detection standard curve; preprocessing original SERS spectral data through standard normal variable transformation (SNV), and establishing a quantitative detection model on the basis of partial least squares (PLS); and after pretreating a to-be-detected food sample, adding the to-be-detected food sample into a Cu2O / Ag surface enhanced Raman substrate, performing uniform mixing so as to obtain a mixed solution, measuring a Raman spectrum after the mixed solution is dried, and calculating the total arsenic content in the to-be-detected food sample through the quantitative detection model. The Cu2O / Ag surface enhanced Raman substrate prepared by the invention can realize label-free, rapid and high-sensitivity detection of total arsenic in food based on an SERS technology. The quantitative detection model is established based on the standard normal variable transformation pretreatment and the partial least square method, so that the total arsenic content in the food is accurately predicted, and rapid evaluation of heavy metals in the food is realized.

Description

technical field [0001] The invention belongs to the technical field of rapid evaluation of food safety, in particular to a surface-enhanced Raman spectroscopy (SERS) detection method for total arsenic content in food. Background technique [0002] As food pollutants, heavy metals are non-degradable and bioaccumulative, and their existence in food and human and animal bodies will cause harmful effects on health. The main sources of heavy metals in food are regional pollution and industrial pollution, such as volcanic eruptions, air pollutant emissions, rock weathering, agricultural and mining activities. Arsenic (As) is a relatively common heavy metal. Long-term exposure to arsenic-contaminated soil and food can easily lead to fatal health diseases, such as nervous system diseases and cardiovascular diseases. Arsenic compounds mainly include: organic arsenic (arsenic betaine, methyl arsenic acid, dimethyl arsenic acid, trimethyl arsenic oxide), inorganic arsenic (As(III), As...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 郭志明陈萍尹丽梅邹小波陈全胜石吉勇欧阳琴赵杰文
Owner JIANGSU UNIV
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