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Classification And Working Principle Of Automatic Biochemical Analyzer

Sep 27, 2018

The automatic biochemical analyzer is an instrument that automates the steps of sampling, adding reagents, de-interference, mixing, incubation, automatic detection, calculation of results, data processing and printing, and cleaning after the experiment.


According to the number of simultaneously measurable items, it can be divided into single channel and multichannel 

According to the degree of automation of the instrument, it is divided into fully automated and semi-automatic biochemical analyzers.

According to the function and complexity of the instrument, it is divided into small, medium, large and super large automatic biochemical analyzers.

According to the structure of the instrument reaction device, it is divided into continuous flow type, discrete type, centrifugal type and dry chemical type.

working principle:

Continuous flow automatic biochemical analyzer:

Samples and reagents are proportionally sucked into a continuous pipline system by a proportional pump, mixed and dialyzed to remove interferences, heat preservation, color development, colorimetry, signal amplification and operation under certain conditions. Since the chemical reaction of the sample to be tested and the reagent mixed are all completed in the same pipeline through a flow process, it is also known as pipeline analyzer.

Discrete automatic biochemical analyzer:

The procedure is programmed by manual operation, and ordered mechanical operation is used instead of manual operation. Add the sample to the respective reaction cups with the sampled probe. The reagent probe is automatically and quantitatively added to the reagent at a certain time, and thoroughly mixed by the stirrer and reacted under certain conditions. Each link is connected by a conveyor belt, which is sequentially operated in sequence, also called "sequential" analysis.

Centrifugal automatic biochemical analyzer:

The sample and the reagent are placed in the rotor position of the centrifuge. When the centrifuge is started, the sample and the reagent in the rotor mix and react by the centrifugal force, after incubation, the reaction liquid finally flows into the colorimetric groove of the outer ring of the shaped reactor, the colorimetric result is obtained. In the analysis process, each step of mixing, reacting and detecting the sample and the reagent is completed at the same time, which belongs to "synchronous analysis".

Dry chemical automatic biochemical analyzer:

The liquid sample to be tested is directly added to the reagent carrier which has been solidified on a special structure, and the reagent solidified on the carrier is dissolved by water in the sample, and then chemically reacted with the component to be tested in the sample. It is a new biochemical detection instrument integrating optics, chemistry, enzyme engineering, chemometrics and computer technology.

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