Enzyme linked immunosorbent assay (ELISA) analyzer is a highly sensitive and quantitative analytical instrument widely used in the biomedical field, particularly suitable for detecting the concentration of biomolecules such as antigens, antibodies, hormones, viruses, cytokines, etc. in samples. ELISA technology is based on immunological principles, combined with enzyme labeling reaction principles, to achieve efficient quantitative detection of target molecules through signal amplification of enzymatic reactions. It has important applications in medical diagnosis, immunological research, food safety testing, and other fields.

1、 Working principle

　　Enzyme linked immunosorbent assay analyzerThe basic working principle is to perform quantitative or qualitative analysis using enzyme labeled detection substances through antigen antibody reactions. The workflow usually includes the following steps:

1. Solid phase immobilization of antigens or antibodies: Firstly, a layer of known antigens or antibodies is immobilized on the surface of a microplate. These antigens or antibodies can provide a stable reaction platform by binding to the surface of the microplate.

2. Sample addition: The test sample is added to a microplate fixed with antigen or antibody, and the target molecule (such as antibody or antigen) will specifically bind to the fixed antigen or antibody on the surface of the microplate.

3. Wash to remove unbound substances: Remove unbound sample components through multiple washes to ensure the specificity and accuracy of the reaction.

4. Add enzyme labeled secondary antibodies: In this step, add secondary antibodies labeled with enzymes. This antibody can bind to the target molecule and generate a measurable signal through enzymatic catalysis. Common enzyme markers include horseradish peroxidase or alkaline phosphatase.

5. Enzymatic reaction: After adding the substrate, the enzyme labeled secondary antibody catalyzes the substrate to undergo a reaction, producing a color change or fluorescent signal that reflects the concentration of the target molecule.

2、 Technical advantages

1. High sensitivity: Enzyme linked immunosorbent assay analyzer has high sensitivity and can detect extremely low concentrations of antigens or antibodies. Through the amplification effect of enzymatic reactions, small changes can be converted into measurable signals, making it widely used in early disease screening and detection of low concentration biomarkers.

2. High specificity: ELISA technology is based on the specific binding of antigens and antibodies, ensuring high accuracy of analysis results. The binding of antigens and antibodies has high specificity, thus eliminating interfering factors and making experimental results more reliable.

3. Strong quantitative ability: Compared with traditional qualitative detection methods, it can provide quantitative detection results. By establishing standard curves, the concentration of target substances in samples can be accurately determined, providing more valuable data for disease diagnosis and scientific research.

4. Easy operation: The ELISA experiment is relatively simple to operate and has a high degree of automation. Operators can choose different detection methods according to their needs, such as direct ELISA, indirect ELISA, sandwich ELISA, etc. The built-in program can automatically complete sample processing, detection, and result output, reducing human error and improving efficiency.

5. Multi detection capability: Supports multi detection, which means detecting multiple target substances simultaneously in the same plate hole. This is very advantageous for clinical combination testing, as it can provide more information in a short period of time and meet the needs of high-throughput screening.

Enzyme linked immunosorbent assay (ELISA) analyzer plays an irreplaceable role in the biomedical field as a precise, sensitive, and efficient detection tool. It not only plays an important role in early disease screening, clinical diagnosis, and scientific research, but also provides critical data support in drug development, vaccine testing, and other fields. With the continuous advancement of technology and the emergence of new detection methods, it will continue to develop and provide more efficient and accurate solutions, promoting progress in the biomedical field.