Ehdotuksen tiedot

Tunnus:ISO/DIS 18127
Julkaisija:ISO
Komitea:ISO/TC 147/SC 2
Komitean nimi:Physical, chemical and biochemical methods
Lausuntokierros alkanut:2024-07-07
Lausuntopyynnön määräaika:2024-09-06
Toimialayhteisö:Suomen ympäristökeskus
Vastuuhenkilö:Jari.Nuutinen(at)syke.fi
Ehdotuksen soveltamisala:
This document specifies a method for the determination of organically bound halogens fluorine, chlorine, bromine and iodine which are adsorbable on activated carbon. Adsorption takes place on activated carbon packed in columns. The method is applicable for the determination of: The method is applicable for the determination of adsorbable organically bound fluorine, chlorine, bromine or iodine in water, e.g. in groundwater, surface water, bank filtrate, drinking water, aqueous eluates, cooling water and wastewater. The working range is limited by the capacity of the activated carbon, the process blank and the capacity of the chromatographic separation column. Sample dilution into the working range can be required. The method can also be applied for samples containing suspended matter. Halogens adsorbed on the suspended solids (e.g. undissolved halides) are determined, too. Filtration of the sample prior to analyses using a membrane filter (0,45 µm) allows the separate determination of dissolved adsorbable and particulate bound fractions of organically bound fluorine, chlorine, bromine or iodine. Procedures for each separate parameter are described in normative Annex A, Annex B, Annex C and Annex D. Alternatively, the adsorption of the organic substances contained in the water sample on activated carbon can also be carried out by the shaking method (see Annex E). Samples with a high content of inorganic halides can be analysed using the solid phase extraction (SPE) method (see Annex F). Results for samples analysed according to Annex E (shaking procedure) or Annex F (SPE procedure) can differ significantly from those of the method specified in the main part. With some waters, interference can occur that cannot be eliminated. These waters cannot be measured with the method. The AOCl, AOBr and AOI results according to Annex B, Annex C and Annex D can also be reported as CIC-AOX(Cl) (Annex J).

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