Key wordstarget, sulfonate, acid, surrogate, unknown, water, fts, pfosa, pfeesa, fosaa, pfmba, pftrea, pftria, pfuna, adona, pfns, mefosaa, pfpes, etfosaa, pfhps, pfdoa, pfds, pfhxa, pfda, pfhpa, pfhxs, pfna, pfbs, pfoa, pfos, pfpea, pfba, compound, fosa, std, method, average, pfas, ion, min, accuracy, evaluated, analyte, spike, rsd, suitability, determined, precision, surrogates, abbreviation