RT null T1 Bi‐ennial Global Interlaboratory Assessment on POPs – Round 4: Appendix III. z-Scores A1 United Nations Environment Programme, K1 persistent organic pollutant YR 2021 FD 2021 LK https://wedocs.unep.org/handle/20.500.11822/36739 UL https://wedocs.unep.org/handle/20.500.11822/36739 NO Appendix III z‐scores pesticides DS UN Environment Document Repository RD Sep 18, 2026