Specialty Services Practice Leader
Jim Occhialini is a vice president with Alpha Analytical and he serves as the practice leader for the laboratory’s specialty analytical services group. Jim has 40 years of environmental analytical and consulting experience working on a wide range of projects. Jim is very active with a number of regulatory workgroups and industry associations where he has given numerous technical presentations and training programs.
A Review of the Potential for PFAS Cross Contamination from Sampling Products
Can per- and polyfluoroalkyl substances (PFAS) be transferred from common products used during sampling? There is the potential for PFAS to be present in many products that are routinely used in the environmental field. Although sampling for PFAS is performed using conventional techniques, current guidelines contain stringent provisions for products and materials to avoid when sampling for PFAS to reduce the potential cross-contamination of samples. The potential presence of PFAS in equipment typically used to collect environmental samples, coupled with the need for very low reporting limits heightens this concern. This presentation will show the results of a study recently performed investigating the potential for cross-contamination from a number of commonly used products. Polytetrafluoroethylene (PTFE), low density polyethylene (LDPE), and high density polyethylene (HDPE) tubing, pump bladders, and other materials were evaluated along with associated products such as aluminum foil and plastic storage bags. A series of experiments were performed utilizing a leaching procedure to evaluate the relative concentrations of PFAS in the leachates of each of the tested sampling materials and the types of PFAS that can be potentially transferred from the tested materials during the sampling process. Knowing the types of PFAS that may leach off of a particular sampling material may also be helpful in the forensic evaluation of sample data. Analytical results will be presented along with experimental observations and recommendations.