NBN ISO 20236:2020

Water 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 (ISO 20236:2018)

WITHDRAWN

About this standard

Languages
English
Type
NBN
Standards committee
NBN/E230
Status
WITHDRAWN
Publication date
23 September 2020
Replaced by
NBN EN ISO 20236:2021
ICS Code
13.060.50 (Examination of water for chemical substances)
Withdrawn Date

About this training

Summary

This document specifies a method for the quantitative determination of selected cyclic volatile methylsiloxanes (cVMS) in non-filtered water samples by purge and trap extraction with isotope dilution gas chromatography-mass spectrometry (GC-MS).
This method is applicable to the determination of individual cVMS, including:
— octamethylcyclotetrasiloxane (D4)
— decamethylcyclopentasiloxane (D5)
— dodecamethylcyclohexasiloxane (D6)
in surface water, ground water, and wastewater. It can be applied to samples within the concentration range of 0,01 µg/ l to 1 µg/ l of each of the target compounds. Depending on the matrix, the method may also be applicable to higher concentrations ranging from 1 µg/ l to 100 µg/ l after suitable dilution of the sample or reduction in sample size.