The temperature of an ashing furnace can vary depending on the specific ashing technique being employed. For dry ashing, the temperature typically ranges from about 500 to 600 degrees Celsius. In the case of low-temperature ashing, the process occurs at approximately 200 degrees Celsius. These temperatures are crucial for the effective combustion of samples, ensuring that organic materials are burned off while leaving the inorganic, non-combustible compounds as ash.
Dry ashing, one of the common techniques, involves the use of a muffle furnace which heats the sample to around 600°C. At this temperature, water evaporates from the sample, and the organic material is burned down, transforming the minerals into oxides, sulphates, and phosphates. This method is particularly used in the food industry to assess the ash content of products, ensuring high quality and compliance with standards. The muffle furnace, such as the one offered by KINTEK, is designed with high-grade materials and includes a digital controller for precise monitoring of time and temperature within the chamber.
Low-temperature ashing, on the other hand, operates at a significantly lower temperature (about 200°C), which can be advantageous for certain materials that might be sensitive to higher temperatures. This method uses less aggressive conditions, which can be beneficial for preserving the integrity of certain minerals or compounds in the sample.
In both cases, the ashing furnace must be capable of providing consistent and controlled temperatures throughout the chamber, withstand aggressive substances during the heating process, and resist mechanical weathering over time. These characteristics ensure the accuracy and reliability of the ashing process, whether it is being used to comply with international standards or to achieve specific analytical objectives such as Loss on Ignition (LOI).
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