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Method for detecting lime substances in flour with near-infrared micro-imaging technology

A near-infrared imaging and technical detection technology, which is applied in the direction of measuring devices, color/spectral characteristic measurement, and material analysis through optical means, can solve problems that have not been widely understood, and achieve obvious detection signals and simple detection steps Effect

Inactive Publication Date: 2011-11-16
BEIJING RES CENT FOR AGRI STANDARDS & TESTING
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Problems solved by technology

[0006] Near-Infrared Micro-Imaging Analysis (Near-Infrared Micro-Imaging Analysis) belongs to molecular spectrochemical imaging, which is a new analysis technology that combines imaging technology and spectral analysis. Not yet widely recognized in the country

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  • Method for detecting lime substances in flour with near-infrared micro-imaging technology
  • Method for detecting lime substances in flour with near-infrared micro-imaging technology

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] figure 1 It is a flow chart of the method for detecting lime substances in flour by the microscopic near-infrared imaging technology of the present invention. like figure 1 Said, the method includes the following steps:

[0026] S100: Taking the surface of a strong reflective material medium such as gold sheet as a reference, use a microscopic near-infrared imager to collect a microscopic near-infrared image of the flour sample to be tested.

[0027] The flour samples are flour mixtures with possibly added calcium oxide, calcium hydroxide or calcium carbonate. Before collecting the microscopic near-infrared images, use a mixing instrument such as a cyclone mill ...

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Abstract

The invention provides a method for detecting lime substances in flour with a near-infrared micro-imaging technology. The method comprises the steps of: collecting a near-infrared micro-image of a flour sample; according to the near infrared spectrum characteristics of lime substances and pure flour, subjecting the near-infrared micro-image of the flour sample to an imaging analysis. Without any complex pretreatment in the whole process, the detection of the invention has simple, rapid and pollution-free steps. Compared with traditional methods, the method provided in the invention has more obvious additive detection signals, thus being more conducive to the detection of very small amounts of additives. As near-infrared lights are stronger than mid-infrared lights in terms of penetrability in substances, so they can adapt to rough surfaces. Besides, near-infrared lights not only can collect the information of the sample surface, but also can go deep into the sample to collect information. Therefore, the near-infrared micro-imaging technology is very suitable for detection of lime substances in flour, thus providing a new method for rapid quality safety screening of market flour.

Description

technical field [0001] The invention relates to the technical field of agricultural product safety, in particular to a method for detecting lime substances in flour using a microscopic near-infrared imaging technique. Background technique [0002] Flour is one of the main sources of food for people. The quality and safety of flour is directly related to people's health. However, in recent years, the quality and safety of flour has attracted widespread attention from all walks of life. In addition to the problematic flour caused by whitening agents, the problematic flour that adds excessive amounts of lime and other inorganic pollutants to achieve weight gain and other effects has also been frequently exposed, which not only causes a huge negative impact, but also seriously endangers people's food safety. and good health. So far, there has been no report on the detection of lime-like substances mixed in flour using microscopic near-infrared imaging technology. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/3563G01N21/359
Inventor 王纪华王冬马智宏陆安祥潘立刚李晓婷
Owner BEIJING RES CENT FOR AGRI STANDARDS & TESTING
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