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BS ISO 17289:2014

Current
Current

The latest, up-to-date edition.

Water quality. Determination of dissolved oxygen. Optical sensor method
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-07-2014

Foreword
1 Scope
2 Normative references
3 Principle
4 Interferences
5 Reagents
6 Apparatus
7 Procedure
8 Calculation and expression of results
9 Test report
Annex A (informative) - Physico-chemical data of
         oxygen in water
Annex B (informative) - Performance data
Bibliography

Defines an optical method for the determination of dissolved oxygen in water using a sensor working on the basis of fluorescence quenching.

This International Standard specifies an optical method for the determination of dissolved oxygen in water using a sensor working on the basis of fluorescence quenching.

Measurement can be made either as a concentration of oxygen in milligrams per litre, percentage saturation (% dissolved oxygen), or both. Depending on the instrument used, detection limits of 0,1mg/l or 0,2mg/l can be reached according to the manufacturer’s manual. Most instruments permit measurement of values higher than 100%, i.e. supersaturation.

NOTE Supersaturation is possible when the partial pressure of oxygen is higher than in air. Especially in case of strong algae growth, supersaturation up to 200% and more is possible.

If waters with a saturation higher than 100 % are measured, it is essential to make arrangements to prevent the outgassing of oxygen during the handling and measurement of the sample. Similarly, it is important that the transport of oxygen into the sample is prevented if the saturation is below 100%.

The method is suitable for measurements made in the field and for continuous monitoring of dissolved oxygen as well as measurements made in the laboratory. It is one of the preferred methods for highly coloured and turbid waters, and also for analysis of waters not suitable for the Winkler titration method because of iron- and iodine-fixing substances, which can interfere in the iodometric method specified in ISO5813.

The method is suitable for drinking waters, natural waters, waste waters, and saline waters. If used for saline waters such as sea or estuarine waters, a correction for salinity is essential for concentration measurement of oxygen.

Committee
EH/3/2
DevelopmentNote
Supersedes 13/30250160 DC. (07/2014)
DocumentType
Standard
Pages
24
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 17289:2014 Identical

ISO 5813:1983 Water quality — Determination of dissolved oxygen — Iodometric method
ISO 5814:2012 Water quality — Determination of dissolved oxygen — Electrochemical probe method
ISO 7888:1985 Water quality — Determination of electrical conductivity
ISO 3696:1987 Water for analytical laboratory use — Specification and test methods

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