A portable sampling device for collecting aerosols from exhaled breath of a subject, using a tubular element comprising a conduit with a lumen (104), an inlet (101) and an outlet (102). At least two baffles (103) are positioned in a selective trap section, each having a height (106) larger than a radius (107) of said lumen (104). The at least two baffles (103) are arranged perpendicular to an inner wall (105) of the conduit and on opposite sides of the lumen (104) to provide a non-straight path through the lumen.
