operation required to transfer as much as possible of the contaminants present in a controlled volume or on the controlled surface of a component into a known volume of extraction liquid for a subsequent analysis

extraction curve:

progress curve of the cleanliness level of an extraction liquid apllied to the test component in relation to time or volume passed through or over the test component

extraction liquid:

liquid used during the extraction procedure to detach the contaminants

extraction procedure:

method defining all the parameters necessary to transfer contaminants from the controlled surface of the test component into the test liquid

extraction volume:

total volume of liquid used to extract the contaminants from a component