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ISO 18073:2004PublishedWater quality — Determination of tetra- to octa-chlorinated dioxins and furans — Method using isotope dilution HRGC/HRMSISO 18127:2026PublishedWater quality — Determination of adsorbable organically bound fluorine, chlorine, bromine and iodine (AOF, AOCl, AOBr, AOI) — Method using combustion and subsequent ion chromatographic measurementISO 18191:2026PublishedWater quality — Determination of pHT in seawater — Method using the indicator dye m-cresol purpleISO/TS 18220:2016PublishedWater quality — Larval development test with the harpacticoid copepod Nitocra spinipesISO 18635:2016PublishedWater quality — Determination of short-chain polychlorinated alkanes (SCCPs) in sediment, sewage sludge and suspended (particulate) matter — Method using gas chromatography-mass spectrometry (GC-MS) and electron capture negative ionization (ECNI)ISO 18724:2025PublishedWater quality — Determination of dissolved chromium(VI) in water — Photometric methodISO 18749:2004PublishedWater quality — Adsorption of substances on activated sludge — Batch test using specific analytical methodsISO 18856:2004PublishedWater quality — Determination of selected phthalates using gas chromatography/mass spectrometryISO 18857-2:2009PublishedWater quality — Determination of selected alkylphenols — Part 2: Gas chromatographic-mass spectrometric determination of alkylphenols, their ethoxylates and bisphenol A in non-filtered samples following solid-phase extraction and derivatisationISO 18857-1:2005PublishedWater quality — Determination of selected alkylphenols — Part 1: Method for non-filtered samples using liquid-liquid extraction and gas chromatography with mass selective detectionISO 18997:2025PublishedWater reuse in urban areas — Guidelines for urban reclaimed water for landscaping usesISO 18998:2026PublishedWater reuse in urban areas — Guidelines for decentralized water reuse system — Management of a decentralized water reuse systemISO 19040-1:2018PublishedWater quality — Determination of the estrogenic potential of water and waste water — Part 1: Yeast estrogen screen (Saccharomyces cerevisiae)ISO 19040-2:2018PublishedWater quality — Determination of the estrogenic potential of water and waste water — Part 2: Yeast estrogen screen (A-YES, Arxula adeninivorans)ISO 19040-3:2018PublishedWater quality — Determination of the estrogenic potential of water and waste water — Part 3: In vitro human cell-based reporter gene assayISO 19340:2017PublishedWater quality — Determination of dissolved perchlorate — Method using ion chromatography (IC)ISO 19458:2006PublishedWater quality — Sampling for microbiological analysisISO 19493:2007PublishedWater quality — Guidance on marine biological surveys of hard-substrate communitiesISO/TS 19620:2018PublishedWater quality — Determination of arsenic(III) and arsenic(V) species — Method using high performance liquid chromatography (HPLC) with detection by inductively coupled plasma mass spectrometry (ICP-MS) or hydride generation atomic fluorescence spectrometry (HG-AFS)ISO 19820:2016PublishedWater quality — Determination of the acute toxicity to the marine rotifer Brachionus plicatilisISO 19827:2016PublishedWater quality — Determination of the acute toxicity to the freshwater rotifer Brachionus calyciflorusISO 20079:2005PublishedWater quality — Determination of the toxic effect of water constituents and waste water on duckweed (Lemna minor) — Duckweed growth inhibition testISO 20179:2005PublishedWater quality — Determination of microcystins — Method using solid phase extraction (SPE) and high performance liquid chromatography (HPLC) with ultraviolet (UV) detectionISO 20227:2017PublishedWater quality — Determination of the growth inhibition effects of waste waters, natural waters and chemicals on the duckweed Spirodela polyrhiza — Method using a stock culture independent microbiotestISO 20236:2024PublishedWater quality — Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion