Accuracy and precision were estimated by analytical recoveryfrom spiked samples. Analytical recovery of each PFAS added tosamples at any given concentration was assessed by measuring thepeak area, calculating the peak area ratio relative to that of the iso-topic IS, and comparing this result with that obtained for a standardsolution containing the same nominal analyte quantities and theisotopic IS.Statistical comparisons were performed by ANOVA (p = 0.05).