POCIS

 Passive sampling enables the monitoring of contaminants (micropollutants or biotoxins) in water (surface water, groundwater, coastal water...) for a short (at least 7 days) to long period (with an average field deployment of one month) for which no power, maintenance and supervision is required. An average of the concentration of collected contaminants is measured in the laboratory.

                       

The Polar Organic Chemical Integrative Sampler (POCIS) is designed to provide the time weighted average (TWA) concentration of hydrophilic organic chemicals (pesticides, drug residues, EDCs…) during the sampling period. 

                                                      Figure: description of POCIS components

POCIS consistS of a solid sorbent contained between two porous membranes. The sorbent collects the contaminant in water. The Organic chemicals are then  extracted from the sorbent following a SPE procedure and analyzed using classical analytical methods by HPLC, and LC-MS, .... 

Figure: steps from POCIS to analysis

Advantages of POCIS

- Can generate a time-weighted average (TWA) concentration of the contaminants in water

- Deployable in harsh conditions

- No a priori preparation or supervision

AFFINISEP provides a complete range of sorbents for the retention of specific molecules or a family of contaminant for Pharmaceutical, Pesticides, Herbicides, Endocrine disruptors, perfluorinated compounds... as well as all necessary accessories such as holder, canister, manifold, ....

POCIS Kits containing PRCs

Performance and reference compound (PRC) is a compound not present in the environment (e.g., a deuterated molecule such as DIA-d5), which is spiked in the sorbent phase of the POCIS before its exposure. PRC can be used as internal standards and can correct Rs from varying environmental conditions.Our kit contains 3 cartridges with the same PRC - sorbent as reference for your measurements.

Please contact us if you need more information. contact@affinisep.com