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Electrochemical Detection of NH4+-NH3 Systems in Water / J. Barica

Conference Author
Water Quality Parameters (1973 : Burlington, Ontario, Canada)
Physical Description
1 online resource (5 pages) : illustrations, figures, tables
Additional Creators
Barica, J, American Society for Testing and Materials, and ASTM International
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Summary
Two methods for determining the forms of ammonia nitrogen in water are described. A univalent cation electrode can be used to detect ionized ammonium if potassium and sodium concentrations of the solution are constant. At pH values less than 7.5 this will correspond to the total ammonia concentration in a water sample. Another approach is to employ a membrane electrode, which is sensitive to unionized ammonia and subject to fewer interferences. It involves an alkalization of a sample to pH 12 and subsequent measurement of liberated unionized ammonia (total ammonia). A direct measurement of free ammonia can be made without alkalization. Suitability of both methods for determination of high ammonia concentrations (above 0.2 to 0.5 mg/liter N) in water samples, mainly fish tanks, is discussed. There is no upper limit of detection, and samples therefore do not require any dilution.
Dates of Publication and/or Sequential Designation
Volume 1975, Issue 573 (January 1975)
Subject(s)
Other Subject(s)
ISBN
9780803155848 (e-ISBN)
9780803155268
0803155263
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 6.
Other Forms
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
Full text article also available for purchase.
Also available in PDF edition.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1975. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
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