DETERMINATION OF AMMONIA IN WASTE-WATERS BY A DIFFERENTIAL PH METHOD USING FLOW-INJECTION POTENTIOMETRY AND A NONACTIN-BASED SENSOR

Authors
SHEN HD CARDWELL TJ CATTRALL RW
Citation
Hd. Shen et al., DETERMINATION OF AMMONIA IN WASTE-WATERS BY A DIFFERENTIAL PH METHOD USING FLOW-INJECTION POTENTIOMETRY AND A NONACTIN-BASED SENSOR, Analyst, 122(1), 1997, pp. 89-93
Citations number
21
Categorie Soggetti
Chemistry Analytical
Journal title
Analyst → ACNP
ISSN journal
00032654
Volume
122
Issue
1
Year of publication
1997
Pages
89 - 93
Database
ISI
SICI code
0003-2654(1997)122:1<89:DOAIWB>2.0.ZU;2-Z
Abstract
A method is described for the determination of total ammoniacal nitrog en in waters using an ammonium ion-selective sensor based on nonactin. The flow injection method relies on the measurement of the potential of the sensor at two pH values, 6.0 and 9.4, and the use of a mathemat ical expression to calculate the total ammoniacal nitrogen concentrati on. The method also compensates for the interference from moderate con centrations of other cations such as potassium and sodium.