= Loss on ignition
{wiki=Loss_on_ignition}
Loss on ignition (LOI) is a quantitative measure commonly used in various fields such as geology, material science, chemistry, and environmental science to determine the amount of combustible material in a sample. It is typically expressed as a percentage of the initial weight of the sample. The process involves the following steps: 1. **Sample Preparation**: A solid sample, such as soil, sediment, or a rock, is collected and prepared for analysis.
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