Fig. 1From: Development of a filter to prevent infections with spore-forming bacteria in injecting drug usersEvaluating the loss of volume in a 0.8 mL heroin sample by filtration using commercially available syringe filters. The Swinnex filter holder was fitted with a 13 mm PVDF membrane. The top panel shows an image of the filters used, with the corresponding data on the loss of volume from these filters in the graph belowBack to article page