A graphite furnace is a specialized type of furnace used in atomic absorption spectrometry (AAS) to measure the concentration of elements at trace and ultra-trace levels.
It utilizes a graphite-based furnace as the heating element.
5 Key Points to Know About Graphite Furnaces
1. High-Temperature Operation
The graphite furnace operates at extremely high temperatures, typically up to 2200℃.
This operation usually takes place in a vacuum or a protective atmosphere environment.
2. Excellent Thermal Properties
The graphite wafer used in the furnace has exceptional thermal properties.
This allows for rapid heating and cooling cycles.
It also ensures high temperature uniformity.
3. Versatile Applications
The graphite furnace is used in various applications, such as ashing or charring.
This is a crucial step in the AAS procedure to remove matrix components that may interfere with analyte measurements.
Ashing temperatures can range from 200º to 1800º C, depending on the matrix and the element being analyzed.
4. Different Configurations Available
There are several configurations of graphite furnaces available.
These include chamber furnaces, bottom loading furnaces, top loading furnaces, tube furnaces, benchtop/cabinet furnaces, continuous/conveyorized furnaces, and walk-in/truck-in furnaces.
Each configuration is suitable for different types of processing and batch sizes.
5. Atmosphere and Control
The atmosphere and control of the graphite furnace can be regulated through various controller types.
These include single setpoint or programmable controllers.
The heat source/transmission can be electric arc, combustion, electric furnace/resistance furnace, indirect/contact/conduction heating, induction heating, infrared/radiation heating, natural gas, or propane.
Continue exploring, consult our experts
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With a high-temperature graphite-based furnace, you can achieve exceptional uniformity and operate in vacuum or protective atmosphere environments.
Don't let matrix interference hinder your results - our graphite furnace AA procedures include ashing to remove unwanted components.
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