PS VOC, our method for passive sampling for volatile organic compounds, consists of an LDPE tube (approximately 35 cm long) with a polyethylene protective mesh on the outside. The tube is filled with deionized water through a fill nozzle and closed with a plug.

The appropriate deployment time is dependent on the time required by the sampler to equilibrate with ambient water and the time required for environmental disturbances caused by the sampler deployment to return to ambient conditions. The rate at which deionized water in the sampler equilibrates with the ambient water depends, e.g., on the type of compound and the water temperature. A minimum equilibrium time of two weeks is suggested for most field applications.

When the sampler is retrieved, a discharge tube is pressed into the membrane and two vials are filled. The samples are then analyzed using standard methods.

Appropriate analytical packages:
OV-5 BTEX
OV-6 Chlorinated aliphatics

For more information on passive sampling, please contact Elsa Peinerud, phone +46 8 5277 5205 or Ingalill Rosén, +46 8 5277 5220.