Page 10 - Food&Beverages PFAS_analysis
P. 10
Instrumentation
It is recommended to use a solvent delay column (installed after
the mixer and before the autosampler) to delay the elution of
PFAS originating from solvent bottles and other parts of the liquid
chromatography system (e.g., pumps and tubing). As shown in
Figure 3 below, using the delay column enables the detection of
PFOA originating solely from the sample.
Additionally, bypassing the degasser when possible is recommended
as well as replacing any PTFE-containing tubing and parts in the LC.
Figure 3: Chromatogram of PFOA:
(a) without delay column and (b) with delay column
10
