Grain production enterprisesThe multi-channel food security heavy metal detector used integrates technologies such as spectral analysis, immunoassay, and electrochemical analysis. The following is a detailed analysis of its core technologies:

1、 Multi channel detection technology

Multi channel design is one of the core advantages of this detector. By equipping multiple independent detection channels, the instrument can simultaneously detect multiple samples or indicators, greatly improving detection efficiency. For example, at the grain procurement site, the detector can quickly screen for pesticide residues, heavy metal content, etc. in a large number of samples, ensuring that unqualified grain does not enter the reserve warehouse.

2、 Spectral analysis technology

Spectral analysis technology is one of the commonly used techniques in multi-channel heavy metal detectors for food security. This technology is based on the detection of the absorption, emission, or scattering characteristics of substances towards specific wavelengths of light. For example:

Near infrared spectroscopy technology: can be used for rapid analysis of nutrient content such as protein, fat, and moisture in grains, as well as detection of pesticide residues and heavy metal content. This technology does not require sample destruction and has fast detection speed, making it suitable for rapid on-site testing.

Raman spectroscopy technology can accurately detect trace amounts of pesticide residues and illegal additives, providing reliable warnings for food security.

3、 Immunoassay technology

Immunoassay technology is based on the principle of specific binding between antigens and antibodies, and has advantages such as high sensitivity and strong specificity. In multi-channel food security heavy metal detectors, immunoassay technology is mainly used to detect fungal toxins and some heavy metals in food. For example:

Fluorescence quantitative immunoassay: By labeling antibodies with fluorescent microspheres, competitive binding reactions occur with target substances (such as fungal toxins and heavy metals) in the sample. The instrument uses a specific wavelength light source to excite fluorescent microspheres, and quantitatively analyzes the content of the target substance by detecting the intensity of the fluorescence signal. This method has fast detection speed, usually taking only 10-12 minutes for the entire detection process, and high accuracy.

Colloidal gold immunochromatography: using colloidal gold particles as markers, binding with specific antibodies to form markers. When the target substance is present in the test sample, it will bind to the colloidal gold labeled antibody, inhibiting the binding of the antibody to the pre packaged antigen on the detection line, resulting in the detection line not showing color. The instrument captures the color changes of the detection line through a high-sensitivity optical module and converts them into electrical signals for analysis and judgment.

4、 Electrochemical analysis technology

Electrochemical analysis technology utilizes the electrochemical behavior of heavy metal ions on electrodes for detection. In multi-channel food safety heavy metal detectors, electrochemical analysis technology is mainly used to detect the content of heavy metals in food. For example:

Electrochemical stripping voltammetry: By combining screen printed electrodes and a simple sample pretreatment method, dual channel or even multiple channel rapid detection can be achieved simultaneously. During the detection process, the instrument applies a specific voltage to the sample, causing heavy metal ions to undergo redox reactions on the electrode surface, generating a current signal. The instrument automatically and accurately analyzes the heavy metal content in the sample by analyzing the magnitude of the current signal.

5、 Intelligent Operating System and Data Processing Technology

Multi channel food safety heavy metal detectors are usually equipped with intelligent operating systems, such as Android intelligent operating system, and are equipped with large-sized high-definition color touch screens. This makes the instrument operation simple and intuitive, even non professionals can easily get started after simple training. At the same time, the instrument has powerful data processing and storage capabilities, which can automatically calculate and analyze detection data, and display the results in intuitive charts and numerical forms. Some instruments also support data export and remote transmission functions, facilitating centralized management and sharing of data.

6、 Integrated and modular design

In order to meet the needs of different detection scenarios, multi-channel food safety heavy metal detectors usually adopt integrated and modular design. For example, integrating incubation and detection functions into a compact structure effectively eliminates errors that may be introduced during human operation. Meanwhile, the detection module can be flexibly combined and configured to meet the needs of different detection projects.