Breath-condensate device

A cartridge device for collecting and analysing a breath condensate, the device comprising a condensation zone to condense exhaled breath from a subject into a condensate, the condensation zone, being operably connectable to a cooling means, the device including one or more further discrete regions for detection of one or more analytes in the condensate and measurement of the one or more analytes, the cartridge device further comprising a fluid path connecting the condensation zone to the or each discrete region, and wherein a surface of the or each discrete region includes a respective surface coating, said respective surface coating including one or more reagents to engage the condensate in the respective discrete region and determine composition, and wherein the cartridge device is configured such that the condensate will form a film in the condensation zone, and wherein the condensation zone includes a condensing surface onto which the exhaled breath condenses to form the condensate as the film, and the condensing surface is arranged to form a contact angle of 20° with the breath condensate from the subject.