First, it is necessary to extract the residual contaminant deposited on the components. The pieces to be analysed are then taken and, taking care to preserve their cleanliness, introduced into a special cabinet. The latter is equipped with a filtration and pressurisation system, which allows for a controlled contamination environment to be replicated (as in a clean room), and an integrated extraction liquid filtration system. This type of instrumentation allows all the residual particulate matter to be extracted in an aseptic and perfectly clean environment, thus preventing contaminants from outside from depositing on the samples, falsifying the test results.