Page 5 - Food&Beverages PFAS_analysis

Background Contamination

In order to check for residual PFAS on sampling equipment and

overall contribution from different sources during the sampling
event, equipment and field blanks should be collected prior

to and during sampling. When collecting samples, personnel
should use new nitrile gloves and replace them frequently to

avoid cross-contamination.

Standard precautions for sample collection (e.g., bottle cap
should not be placed on any other surface, avoid contact with

inside of cap or bottle) should be strictly followed. After the
sample is collected and capped, the sample bottle(s) should

be placed in a resealable plastic bag separate from all other
sample bottles.

Avoid reusing sampling equipment as previous uses may have

involved PFAS-containing materials. Maintain separate supplies
for PFAS sampling and for other contaminants. Before using

new equipment, test for the presence of PFAS.

When reuse of materials and sampling equipment is
necessary, lab and field personnel should follow standard

decontamination procedures (as described later in this
ebook) and confirm the absence of PFAS before reusing the

equipment. It is also recommended to avoid the use of any
materials listed on pages 3 and 4.
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