Checking the ash content of a muffle furnace involves several steps and precautions to ensure accurate results.
A muffle furnace is used to combust a sample, leaving behind inorganic ash which represents the mineral content of the material.
The ash content determination is crucial for evaluating the quality of materials, especially in food products.
5 Steps to Accurate Results
1. Sample Preparation
The sample should be flattened and placed in a porcelain boat.
Ensure the thickness is not too large.
2. Insertion into the Furnace
The porcelain boat with the sample is slowly introduced into the furnace.
Initially, the sample is slowly ashed until it no longer emits smoke.
Then, it is pushed into the hotter part of the furnace.
3. Temperature Control
The furnace is set to burn the sample at a temperature of 815±15°C.
The heating furnace should have a chimney or ventilation holes to maintain air circulation.
4. Timing
The ashing time should be sufficient to completely ash the sample at the specified temperature.
It should not be unnecessarily prolonged.
5. Measurement
The difference in weight of the sample before and after ashing is used to calculate the percentage of ash content.
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