Total ASH
It's the inorganic residue (minerals, salt, silica) after burning the sample in a furnace, revealing the total mineral content. Ash itself provides no calories but signals mineral levels and potentially unwanted soil. High ash in samples often means high soil contamination, reducing nutrient density and potentially causing issues in consumers.
Methods:
Muffle furnace: A precise method involves weighing a sample, heating it in a mufle furnace (around 550-600°C) until all organic matter burns off (ash remains), cooling, and re-weighing to find the percentage.
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