RT null T1 Protocol for the Sampling of Water as a Core Matrix in the UNEP/GEF GMP2 Projects for the Analysis of PFOS A1 United Nations Environment Programme, K1 sampling K1 water YR 2017 FD 2017 LK https://wedocs.unep.org/handle/20.500.11822/27637 UL https://wedocs.unep.org/handle/20.500.11822/27637 DS UN Environment Document Repository RD Sep 17, 2026