1. Classification according to the degree of automation
1) Fully automatic biochemical analyzer: the whole process of sampling and output is automated. As long as the operator puts the sample into the analyzer and enters the item code to be measured. The instrument automatically operates according to the analysis program and automatically prints the test result.
2) Semi-automatic biochemical analyzer: equivalent to a continuous flow colorimeter, the flow tube is a cuvette, which has the advantages of simple structure and low price.
For the second-generation automatic biochemical analyzer, the main difference from the flow type is that the chemical reaction between each sample to be tested and the reagent mixture is completed in the respective reaction vessels.
It is third generation automatic biochemical analyzer. In the centrifugal analyzer, each sample to be tested is mixed with reagent in a respective reaction tank under the action of centrifugal force, and the chemical reaction is completed, and then determined. It is also a "synchronous analysis". Under the action of centrifugal force, each sample to be tested is mixed and reacted with the reagent at the same time, and is reported after being measured; while other analyzers are "sequential analysis".
4. Dry film
It is a discrete analyzer, which is characterized by solid phase chemistry, which is to add the liquid sample to be tested to the dry film reagent carrier with solid structure and special structure, The dry tablet reagent on the carrier was dissolved and reacted with the components to be measured in the sample to produce a color reaction, which could be determined by reflectance spectrophotometer. This type of method completely removes the liquid reagent, so it is also called dry chemical method, and can also be used for the determination of the electrolyte.