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  • BSI
    BS EN ISO 15681-2:2018 Water quality. Determination of orthophosphate and total phosphorus contents by flow analysis (FIA and CFA) - Method by continuous flow analysis (CFA)
    Edition: 2018
    $435.35
    / user per year

Description of BS EN ISO 15681-2:2018 2018

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.



Standard NumberBS EN ISO 15681-2:2018
TitleWater quality. Determination of orthophosphate and total phosphorus contents by flow analysis (FIA and CFA) - Method by continuous flow analysis (CFA)
StatusDefinitive
Publication Date2018-12-11
ReplacesBS EN ISO 15681-2:2004, BS EN ISO 15681-2:2004
Identical National Standard OfISO 15681-2:2018, EN ISO 15681-2:2018
DescriptorsFlow analysis, Chemical analysis and testing, Test equipment, Instrumental methods of analysis, Water testing, Phosphorus, Determination of content, Quality, Decomposition reactions, Orthophosphates, Phosphorus inorganic compounds, Water, Hydrolysis
ICS13.060.50 Examination of water for chemical substances
CommitteeEH/3/2
ISBN978 0 580 93281 6
PublisherBSI
Pages28

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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