Trace analysis of mono-, di-, tri-substituted polyfluoroalkyl phosphates and perfluorinated phosphonic acids in sewage sludge by high performance liquid chromatography tandem mass spectrometry

► Solvents were firstly studied for simultaneous extraction of PAPs and PFAPs. ► Different SPE adsorbents were optimized for clean-up of sludge samples. ► Two mono-PAPs were found in sludge in China with concentrations up to 10.7 ng/g.