Abstract: The invention relates to apparatus for extracting solvents in a microwave field, having a microwave oven (11) which comprises at least one microwave generator (12), a control unit (13) and at least one microwaving chamber (14), said chamber being fitted with venting apertures (23) and at least one suction exhaust aperture (24) which is connected by an exhaust air line (25) to a source of partial vacuum (26), further comprising a rotor (16) rotatably mounted in said chamber and fitted with several specimen receptacles (18) that may be loaded with solvent. The apparatus is characterized in that a flow detector (28) is mounted downstream of the suction exhaust aperture (24), said detector reducing or preferably shutting off the power output of the microwave generator (12) when detecting a flow of air which is less than a predetermined limit value, said airflow limit value being selected in a manner precluding forming an explosive mixture of solvent and air in said chamber.