Instrument Introduction

●In terms of digestion, microwave enhanced chemistry technology has a faster digestion speed and can process a batch of samples faster than the general electric heating plate method10-100times

●Good digestion effect, using high-pressure sealed container while microwave heating, sample digestion *, especially effective for difficult to hold samples

●The sample is digested in a closed digestion tank, greatly reducing the loss of volatile elements. Therefore, making the analysis results more accurate

●Microwave digestion uses fewer reagents, reducing the blank value and background of the sample

●The entire digestion process is carried out under sealed conditions, and the acidic reagent will not pollute the environment, which is beneficial for environmental protection and personal health

●The energy-saving effect is very significant, and compared to traditional methods, it saves energy80%Left and right

●The parallelism and repeatability of samples processed in the same batch are good, avoiding errors caused by human operation

The "Microwave Sample Processing System" developed and produced by Meicheng Science and Technology Instrument is a "15th Five Year Plan" scientific and technological research project of the Ministry of Science and Technology of China. On the basis of absorbing * technology, the product adopts frequency conversion technology and large cavity microwave design, especially innovative in explosion-proof safety technology（Declared）Among themMDOur products have won the bidding of the Chinese Academy of Sciences and the Ministry of Education for many times,MPThe various indicators of the product are close to the level of similar products.

application area

The microwave sample processing method is a processing technique developed in the past thirty years, known as "microwave strong chemistry". Place the sample and corresponding reagents in a high-temperature and high-pressure sealed sample tank or open container. Under the action of microwave, according to certain experimental methods, the sample and reagents undergo rapid and intense physical and chemical reactions. It can be applied to various sample pretreatment tasks in analytical chemistry such as digestion, extraction, and protein hydrolysis. In addition, microwave organic synthesis will replace traditional synthesis methods with its application advantages. Such as atomic absorption spectrometer（AAS）Atomic Fluorescence Spectrometer（AFS）Inductively Coupled Plasma Emission Spectrometer（ICP-AES）Inductively Coupled Plasma Mass Spectrometer（ICP-MS）High performance liquid chromatography（HPLC）Gas chromatograph（GC）More and more laboratories are using microwave sample processing systems to replace time-consuming, labor-intensive, and heavily polluting methods for sample preparation using analytical instruments.

Structural characteristics
Furnace cavity sprayed with materials produced by DuPont in the United StatesPFA(Perfluoroalkoxy ethylene), resistant to industrial strong acids and high temperatures
There is a wavelength reducer installed outside the furnace cavity to ensure that microwave leakage is far below the national standard
The furnace chamber is equipped with an exhaust fan and an external smoke exhaust pipe, with a wind speed of:3m³/minEnsure that20Reaching the opening temperature within minutes
There is a sample tank rack in the furnace chamber, which is controlled by a light controlled reversible motor,360The reciprocating rotation ensures that the sample tank receives microwave energy more evenly, ensuring that the temperature of each sample tank is consistent*
The lower part of the microwave oven is equipped with a pressure sensor and a temperature measurement and control circuit system
● Can achieve continuous adjustment of output power and stable microwave output

Technical performance characteristics
Using a microwave sample preparation system, the sample preparation time has been reduced by 90%
● The turntable can rotate 360 ° in reverse to ensure that all samples receive microwave energy uniformly during each operation
Equipped with a safety door lock and pressure sensor safety protection device to ensure safety
High pressure sealed water pipe detection system pressure, feedback control, overpressure alarm
Equipped with a built-in Pt100 platinum resistor for precise temperature control, real-time monitoring of temperatures up to 300 ℃, with a temperature control accuracy of ± 0.5 ℃. Stable performance and durability
Adopting direct contact pressure measurement method, the pressure reflects truthfully and accurately, with real-time monitoring up to 900psi and control accuracy of 0.01MPa
● Process up to 10 samples simultaneously in the same batch
The protective pressure of the safety diaphragm is 200psi for medium pressure and 400psi for high pressure
By changing the microwave frequency through PID control to adjust different output powers, the efficiency of the power supply is improved, and the power consumption during standby is reduced, saving more than 20% of electricity compared to traditional microwave digestion. In addition, the introduction of frequency conversion technology has also reduced the working noise of instruments
Six fold security measures

Three proactive measures to ensure that dangerous situations do not occur
A safe and reliable control system with slope control function to prevent voltage rise or temperature overshoot
● Truly achieved dual control of temperature and pressure in the same tank, with small differences, safe and reliable
If the pressure inside the tank exceeds the set protection value, the microwave heating will automatically stop

Three passive measures to ensure personal safety and minimize financial losses in the situation
Install a safety explosion-proof film on the sample tank, which will rupture first in case of overpressure, relieve pressure and prevent explosion, and also prevent damage to the sample tank
Self locking safety explosion-proof door with special sliding structure (approved application)
The control part and digestion furnace body are designed in a separate manner with rigorous and reliable operating procedures to ensure that personal injury is not caused under certain circumstances

Technical parameters of microwave digestion instrument:

Configuration List:

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