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Analytical Lab Instruments - Microwave Digestion

Microwave Digestion

Microwave Digestion, is a specialized and proven method for preparing samples for elemental analysis. When dealing with samples requiring analysis for trace elements, the transition to a liquid form is essential for compatibility with analytical equipment—a crucial step known as sample preparation.

Microwave-assisted sample preparation relies on acid digestion, a fundamental technique in sample preparation. This process involves using acids to dissolve or break down a sample, leaving only the (trace) metals in solution. This transformation turns samples into analyzable liquids, a necessity for analytical equipment to accurately detect small concentrations of toxic metals in clear, particle-free solutions.

The stringent requirements for microwave digestion underscore its role as a highly reliable method, ensuring the integrity of analytical data. With efficient microwave heating, precise reaction control, and robust temperature and pressure tolerance, this method facilitates the analysis of diverse substances such as food, soil, and pharmaceuticals. This capability supports the success of subsequent elemental analysis, making microwave digestion a key player in the field.

  • The outer vessel of TTMWDXV exclusively made by ultra strength aerospace composite fiber is invincible in anti-explosion, and its performance indicators such as corrosion resistance, high temperature/impact/pressure resistance are far better than that of the widely used modified PEEK engineering plastics vessel (this material is fusible at high temperature, fragile at high pressure and explosive by chemical corrosion), fundamentally eliminating safety risks to operator in use
  • Quantified safety bolt design, ensures samples be closed completely and triggers a quantified pressure relief while over pressure; Safety Bolt unit, instead of safety membrane and other consumables, ensures the digestion vessel be sealed completely under normal working conditions, which avoids the loss of volatile elements and incomplete digestion. And only when the pressure is too high and may constitute a danger to the safety, the safety bolt will automatically blow out vertically and the cover auto-up to release the pressure, achieving quantified vertical blast pressure-relief to guarantee its well operation. Under normal operation, the safety bolt requires no replacement. In addition, it is easy for venting to open the cover after completion of digestion.
  • The industrial-leading pressure measuring technology by piezoelectric crystal and high-precision Pt sensor temperature measurement, through closed-loop control of microwave power by inverter technique, ensure the accuracy of pressure and temperature monitoring and control. The application of patented piezoelectric crystal brings complete isolation of samples from pressure measurement system in digestion process, thoroughly solving the problems of cross contamination of samples due to commonly used air pipe in market and of the limitation in digestion samples because of low-pressure proof of air pipe.
  • The whole set of digestion vessels was designed to rotate continuously in one direction, it breaks conventions of <360 ° back and forth rotation, avoiding uneven heating on vessels and reducing impact on turntable motor to extend service life. The temperature and pressure cables are short, that they are free from twisting in running and can be disassembled easily.
  • The new industrial design is smart and colorful, that in line with the needs of modern laboratory construction needs. It re-layout its internal structure more scientifically, with the 65L industrial 316L stainless steel reactor chamber and dual magnetron structure, ensures uniform heating of the microwave and high microwave power emitting low-pressure proof of air pipe.
  • The whole set of digestion vessels was designed to rotate continuously in one direction, it breaks conventions of <360 ° back and forth rotation, avoiding uneven heating on vessels and reducing impact on turntable motor to extend service life. The temperature and pressure cables are short, that they are free from twisting in running and can be disassembled easily
  • The new industrial design is smart and colorful, that in line with the needs of modern laboratory construction needs. It re-layout its internal structure more scientifically, with the 65L industrial 316L stainless steel reactor chamber and dual magnetron structure, ensures uniform heating of the microwave and high microwave power emitting.
  • Innovative remote wireless video monitoring system, together with the high-intensity transparent quartz vessel, makes the digestion process clearly visible. Mobile phones and tablets can realize the observation and monitoring of the reaction, making the operation safer and more convenient.
  • Sturdy and durable industrial-grade chamber design strengthen its impact resistance, and multi-layer chemical resistant coating greatly improves the service life and safety of the system; the popup cushioning explosion-proof sliding chamber door (Auto-Pop structure) builds a passive safety protection system, and it can disable the microwave power automatically once explosion happens; efficient exhaust system design achieves fast and safe forced air cooling (20 min cooling time from 200°C to 60°C), improving operational efficiency.
  • With 16 high-throughput RV100 digestion vessel set, TTMWDXV can work for long time digestion at ultra high temperature. It meets the requirements for most of the digestion tasks; the new 8 QZ-100 quartz closed vessel set dramatically improves the digestion capability and visibility, even the most demanding materials could be successfully digested. With remote Wi-Fi video monitoring system for quartz vessel, the whole process can be observed, pictures and videos are available during the entire process.

    16 RV100 ultra-high-strength frame closed vessel

    16 RV100 ultra-high-strength frame closed vessel 16 high-throughput RV100 digestion vessel set adopts the latest technologies and high-end materials, it is capable of long time digestion work under high temperature and pressure, which can meet the needs of vast majority of digestion tasks. It is especially suitable for the test house or labs handling with various sample types and large capacity. RV100 is also suitable for the applications of solvent extraction, microwave kjeldahl nitrogen determination and microwave hydro-thermal synthesis, etc.

    TTMWDXV-DR microwave sample drying rotor

    TTMWDXV-DR microwave drying rotor realizes rapid and uniform drying, it takes the moisture off sample through microwave heating and vortex air. The sample drying time is only a quarter of that required by conventional heating. The special design of the air inlet and outlet can prevent sample from contamination and loss, at the same time, there is no carbonized risks of the sample by microwave heating. The heating task can be completed without any modification of the main machine. It meets the standard for special sample testing like soil.

    Technical Specification

    Size of drying plate
    27cm in diameter
    Drying plate material
    TFM (modified polytetrafluoroethylene)
    Drying wind speed
    Three adjustable grades of high, middle and low drying wind
    Model
    TTMWDXV
    Microwave source
    2450MHz, dual magnetron design
    Installed power
    3600W
    Maximum output power
    2200W, non-pulse continuous automatic variable frequency control
    Cavity
    65L industrial grade 316L stainless steel chamber, multi-layer chemical resistant PFA coating
    Door design
    6 layer steel structure and popup cushioning explosion-proof sliding chamber door (Auto-Pop) design, electronic and mechanical dual-control door lock
    Video monitoring system (Optional)
    Wireless video monitoring system, mobile phones and tablets can realize the observation and monitoring of the reaction
    Pressure measurement and control system
    Piezoelectric crystal pressure sensor,
    Pressure control range :0~10MPa (1500 psi),
    Accuracy ± 0.01MPa
    Temperature measurement and control system
    High-precision platinum resistor temperature sensor,
    Temperature range: 0-300°C, accuracy ±1°C;
    IR temperature sensor as optional, temperature range: 0-300°C, accuracy ±1°C.
    Outer vessel material
    Explosion-proof outer vessel made of aerospace composite fiber. high temperature and pressure resistance reach 600°C and 66 Mpa (10000psi)
    Inner vessel material
    Modified TFM material
    Chamber exhaust system
    High-power anticorrosion axial fan, 20 minutes cooling time (from 200°C to 60°C)
    Working environment
    0~40°C, 15~80%RH
    Physical size/weight
    550 × 670 × 700mm, 70 KG
    Reaction vessel
    16 RV100 ultrahigh strength frame closed vessel
    Model of reaction vessel
    RV100
    Processing capacity in one batch
    16
    Inner vessel material
    TFM
    Explosion-proof outer vessel material
    Aerospace composite fiber Xtra Fiber
    Frame structure of digestion rotor
    Independent frame structure of each digestion vessel
    Reaction vessel volume
    100ml
    Maximum design pressure
    10MPa (1500psi)
    Maximum temperature
    300°C
    Maximum sample amount
    0.5-1.0g
    Resistance to HF
    Yes
    Magnetic stirring function
    No
    Typical application
    Food, soil, metal, alloy, cosmetic, plant, etc.
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