Abstract: The present disclosure generally pertains to chemical extraction apparatuses and methods for extracting volatile, semi-volatile, and non-volatile chemicals from a user's oral cavity. In one exemplary embodiment, a chemical extraction apparatus is composed of absorbent material, which is positioned within the oral cavity of a user for a period of time. Volatile, semi-volatile, and non-volatile chemicals are extracted from the breath and saliva of the user. By keeping the absorbent material in the oral cavity for an extended period of time, such as several minutes or hours depending on the types of materials selected, even trace levels of a chemical can be concentrated in the absorbent material thereby enabling conventional analytical techniques to detect the chemical.