Skip to main content
Back

EVS-EN ISO 15681-2:2018

Water quality - Determination of orthophosphate and total phosphorus contents by flow analysis (FIA and CFA) - Part 2: Method by continuous flow analysis (CFA) (ISO 15681-2:2018)

General information

Valid from 19.12.2018
Base Documents
ISO 15681-2:2018; EN ISO 15681-2:2018
Directives or regulations
None

Standard history

Status
Date
Type
Name
19.12.2018
Main
07.03.2005
Main
This document specifies continuous flow analysis (CFA) methods for the determination of
orthophosphate in the mass concentration range from 0,01 mg/l to 1,00 mg/l P, and total phosphorus
in the mass concentration range from 0,10 mg/l to 10,0 mg/l P. The method includes the digestion of
organic phosphorus compounds and the hydrolysis of inorganic polyphosphate compounds, performed
either manually, as described in ISO 6878 and in References [4], [5] and [7], or with an integrated
ultraviolet (UV) digestion and hydrolysis unit.
This document is applicable to various types of water, such as ground, drinking, surface, leachate and
waste water. The range of application can be changed by varying the operating conditions.
This method is also applicable to the analysis of seawater, but with changes in sensitivity by adapting
the carrier and calibration solutions to the salinity of the samples.
It is also applicable to analysis using 10 mm to 50 mm cuvettes depending on the desired range. For
extreme sensitivity, 250 mm and 500 mm long way capillary flow cells (LCFCs) can be used. However,
the method is not validated for these two uses. Changes in sensitivity and calibration solutions could be
required.
Annex A provides examples of a CFA system. Annex B gives performance data from interlaboratory
trials. Annex C gives information of determining orthophosphate-P and total-P by CFA and tin(II)
chloride reduction.

Required fields are indicated with *

*
*
*
PDF
19.52 € incl tax
Paper
19.52 € incl tax
Browse standard from 2.44 € incl tax
Standard monitoring

Customers who bought this item also bought

Main

ISO 21676:2018

Water quality -- Determination of the dissolved fraction of selected active pharmaceutical ingredients, transformation products and other organic substances in water and treated waste water -- Method using high performance liquid chromatography and mass spectrometric detection (HPLC-MS/MS or -HRMS) after direct injection
Newest version Valid from 15.10.2018
Main

ISO/TS 21231:2019

Water quality -- Characterization of analytical methods -- Guidelines for the selection of a representative matrix
Newest version Valid from 05.02.2019
Main

CEN/TS 16800:2015

Guideline for the validation of physico-chemical analytical methods
Withdrawn from 31.12.2020
Main

EVS-EN ISO 9963-2:1999

Water quality - Determination of alkalinity - Part 2: Determination of carbonate alkalinity
Newest version Valid from 01.01.2000