19/30349828 DC - BS ISO 21793. 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

19/30349828 DC

BS ISO 21793. 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

Status : Current, Draft for public comment   Published : June 2019

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This document specifies a multi‑parameter method for the determination of total organic carbon (TOC), total nitrogen (TN) and total phosphorus (TP) in drinking water, raw water, ground water, surface water, sea water, saline water, process water, wastewater and industrial wastewater applications, after a chemical oxidation process. It is applicable to both dissolved and bound to suspended materials.

The method allows for determination of TOC ≥ 1 mg/l, TN ≥ 1 mg/l and TP ≥ 1 mg/l. The lower and upper working ranges are restricted by instrument‑dependent conditions (for example sample volume, reaction chemistry amounts) and can be adjusted for a wider range.

The analysis procedure is carried out instrumentally by a single oxidation process under standard temperature and pressure.

Dissolved nitrogen gas is not included in the TN measurement in this method. Depending on the analysis conditions and when present in the sample, certain portion of elemental carbon, cyanide and cyanate can be included in the TOC result.

NOTE

The method can be applied for the determination of total carbon (TC) and total inorganic carbon (TIC). Volatile or purgeable organic carbon (VOC, POC) can be determined separately by this method (see Annex A).




Standard Number19/30349828 DC
TitleBS ISO 21793. 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
StatusCurrent, Draft for public comment
Publication Date03 June 2019
Normative References(Required to achieve compliance to this standard)ISO 5725-2:2019, BS ISO 5725-2:2019, ISO 5667-3, ISO 8245, ISO 3696, ISO 8573-1, ISO 8466-1
Informative References(Provided for Information)BS ISO 5725-2:2019, ISO 5725-2:2019, ISO/TS 13530
International RelationshipsISO/DIS 21793
Draft Expiry Date24 July 2019
DescriptorsPhosphorus, Nitrogen, Carbon, Quality, Water
ICS13.060.50
Title in FrenchQualité de l'eau — Détermination du carbon organique total (COT), du carbone organique dissous (COD), de l'azote total lié (TNb), de l'azote dissous lié (DNb), du phosphore total lié et du phosphore dissous lié (DPb) après oxydation par l'ozone avec des radicaus hydroxyles et catalyseur en milieus aqueux
CommitteeEH/3/2
PublisherBSI
FormatA4
DeliveryYes
Pages29
File Size594 KB
NotesWarning: this draft is not current beyond its expiry date for comments.
Price£20.00


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