Introduction
The digestion furnace is a sample digestion and conversion device designed based on the principles of classical wet digestion. It is primarily used in sectors such as agriculture, forestry, environmental protection, geology and petroleum, the chemical industry, and food processing, as well as in universities and research institutions. Capable of efficiently digesting samples—such as plant matter, seeds, animal feed, soil, and ores—prior to chemical analysis, it serves as an ideal sample pretreatment unit for use with Kjeldahl nitrogen analyzers.
Product Features
1. The heating system has been redesigned and optimized to effectively improve temperature uniformity across the heating module's wells, ensuring consistent sample digestion and reliable analytical results.
2. The heating module is constructed from high-quality aluminum alloy with a specialized surface treatment, offering both durability and an attractive appearance while meeting the demands of high-temperature digestion applications.
3. The instrument platform and test tube rack feature a stainless steel design that offers excellent corrosion resistance, making the unit suitable for complex laboratory environments and ensuring long-term, stable operation.
4. It utilizes an LCD temperature controller with features such as timed shutdown and alarms; intelligent PID control technology ensures high temperature precision and minimal overshoot, while the interface remains simple and easy to operate.
Recommended Accessories (Purchased Separately)
The Kjeldahl digestion process generates corrosive gases that can impact the laboratory environment if not handled promptly. We recommend using an exhaust collection and treatment system to effectively improve the laboratory environment and protect the equipment.
Exhaust collection hood
Jet vacuum pump
Exhaust neutralization unit
Configuration List
1. Main unit (1)
2. 8-well digestion tube rack (1)
3. Digestion tubes (8)
Other Accessories and Consumables
Exhaust collection hood
The exhaust collection unit is constructed from materials resistant to high temperatures and strong acid/alkali corrosion. It effectively seals and collects corrosive gases generated during sample digestion, reducing acid mist leakage and improving the laboratory working environment. The collection manifold extends into the digestion tubes to capture exhaust gases, enhancing collection efficiency and ensuring a safer, more reliable digestion process. Constructed from highly corrosion-resistant materials, the unit is robust and durable, offering stable, long-term performance with minimal maintenance requirements, thereby reducing operating costs for the user.
Jet Vacuum Pump
The jet vacuum pump generates negative pressure via water flow, efficiently discharging corrosive gases produced during digestion into the drainage system. This accessory effectively minimizes the escape of exhaust gases, significantly improving the laboratory working environment. It features a simple design with no moving mechanical parts, making it resistant to corrosive gases and ensuring stable operation with low maintenance needs.
Exhaust Neutralization Unit
This unit treats corrosive gases generated during digestion. Utilizing a secondary circulation neutralization technique, it effectively reduces acidic gas emissions and mitigates corrosion of the laboratory environment and equipment. Unlike systems relying solely on fume hood exhaust, this unit neutralizes exhaust gases before discharge, drastically lowering corrosive gas concentrations and reducing damage to the laboratory's exhaust system, thereby enhancing safety and environmental compliance. It features a compact design with a built-in neutralization solution reservoir; the capacity is sufficient to handle exhaust from approximately 1 to 3 digestion runs, depending on the number of samples processed. The unit operates independently of external water supplies, allowing for flexible placement.
Digestion Tubes
Precision-crafted from high-quality borosilicate glass, these digestion tubes offer excellent resistance to acids and alkalis and a long service life. They are available in three sizes—100 ml, 250 ml, and 750 ml—to suit various application needs. The main unit comes standard with 250 ml tubes, offering high flexibility with no minimum sample volume requirement, making them suitable for most Kjeldahl digestion applications. The 100 ml and 750 ml sizes are available for separate purchase.
High-Efficiency Kjeldahl Digestion Catalyst Tablets
These catalyst tablets accelerate the decomposition of organic matter during Kjeldahl digestion, thereby increasing efficiency. Formulated from a blend of potassium sulfate and copper sulfate, the tablets work by raising the boiling point of the digestion mixture (potassium sulfate) and catalyzing organic matter decomposition (copper sulfate). This promotes the complete conversion of organic nitrogen in the sample into ammonium nitrogen, shortening digestion time and ensuring more thorough digestion.
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