What is the digester for?

    A common sample pretreatment equipment can be divided into semi-automatic digester and full-automatic digester according to the degree of automation; According to the principle, it can be divided into electrothermal digester and microwave digester.

Second, the organizational structure and principle:

    (1) comprising a heating body, wherein the heating body is connected with an AC power supply through a heating main circuit to form a heating loop, and the heating main circuit comprises a air switch, a single-phase full-bridge rectifier filter unit and a Buck main circuit which are connected in series in sequence;

    (2) It also comprises a temperature sensor arranged on the heating body, which is respectively connected with a singlechip and a PWM control drive unit through a filter amplification unit, wherein the singlechip is connected with the PWM control drive unit, and the PWM control drive unit is connected with the Buck main circuit through an isolation drive unit;

    (3) the 3)PWM control drive unit samples the current in the heating circuit through the sampling resistor; The output end of the single chip microcomputer is connected with an output device for displaying temperature, and the input end is connected with an input device for setting parameters.

    3. Application: In the sample pretreatment of various analytical chemistry such as digestion, extraction and protein hydrolysis, in addition, microwave organic synthesis will replace the traditional synthesis method with its absolute application advantages. Such as atomic absorption spectrometer, atomic fluorescence spectrometer, inductively coupled plasma emission spectrometer, inductively coupled plasma mass spectrometer and high performance liquid chromatograph.

    Fourth, technical analysis:

    (1) The sample is digested in a closed digestion tank, which greatly reduces the loss of volatile elements. Therefore, the analysis result is more accurate.

    (2) The whole digestion process is carried out under closed conditions, and the acid reagent will not pollute the environment, which is beneficial to environmental protection and personal health.

    (3) Microwave-enhanced chemical technology has a fast digestion speed, and it is 10-100 times faster to treat a batch of samples than the general electric heating plate method.