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GSO ISO 21675:2026
ISO 21675:2019
Gulf Standard
Water quality — Determination of perfluoroalkyl and polyfluoroalkyl substances (PFAS) in water — Method using solid phase extraction and liquid chromatography-tandem mass spectrometry (LC-MS/MS)
GSO ASTM D4195:2026
ASTM D4195:23
Gulf Standard
Standard Guide for Water Analysis for Reverse Osmosis and Nanofiltration Application
GSO ISO 10304-4:2026
ISO 10304-4:2022
Gulf Standard
Water quality — Determination of dissolved anions by liquid chromatography of ions — Part 4: Determination of chlorate, chloride and chlorite in water with low contamination
GSO ISO 16588:2013/Amd1:2025
ISO 16588:2002/Amd 1:2004
Amendment to Gulf Standard
Amendment 1 - Water quality – Determination of six complexing agents – Gas-chromatographic method
GSO ISO 22743:2008/Cor 1:2025
ISO 22743:2006/Cor 1:2007
Gulf Standard
Water quality — Determination of sulfates — Method by continuous flow analysis (CFA)
GSO ISO 21793:2024
ISO 21793:2020
Gulf Standard
Water quality — Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb), dissolved bound nitrogen (DNb), total bound phosphorus (TPb) and dissolved bound phosphorus (DPb) after wet chemical catalysed ozone hydroxyl radical oxidation (COHR)
GSO ISO 23697-1:2024
ISO 23697-1:2023
Gulf Standard
Water quality — Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes — Part 1: Dimethylphenol colour reaction
GSO ISO 23695:2024
ISO 23695:2023
Gulf Standard
Water quality — Determination of ammonium nitrogen in water — Small-scale sealed tube method
GSO ISO 23696-2:2024
ISO 23696-2:2023
Gulf Standard
Water quality — Determination of nitrate in water using small-scale sealed tubes — Part 2: Chromotropic acid colour reaction
GSO ISO 18635:2021
ISO 18635:2016
Gulf Standard
Water 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)
GSO ISO 18191:2021
ISO 18191:2015
Gulf Standard
Water quality — Determination of pHt in sea water — Method using the indicator dye m-cresol purple
GSO ISO 21253-2:2021
ISO 21253-2:2019
Gulf Standard
Water quality — Multi-compound class methods — Part 2: Criteria for the quantitative determination of organic substances using a multi-compound class analytical method