On-line monitoring of calcium in natural, borehole and boiler feed water with a flow injection system using a calcium-selective membrane electrode asa sensor

Authors
van Staden, JF Stefan, RI
Citation
Jf. Van Staden et Ri. Stefan, On-line monitoring of calcium in natural, borehole and boiler feed water with a flow injection system using a calcium-selective membrane electrode asa sensor, S AFR J C-S, 52(1), 1999, pp. 24-26
Citations number
18
Categorie Soggetti
Chemistry
Journal title
SOUTH AFRICAN JOURNAL OF CHEMISTRY-SUID-AFRIKAANSE TYDSKRIF VIR CHEMIE
ISSN journal
03794350 → ACNP
Volume
52
Issue
1
Year of publication
1999
Pages
24 - 26
Database
ISI
SICI code
0379-4350(199912)52:1<24:OMOCIN>2.0.ZU;2-V
Abstract
An on-line automated system for the determination of calcium in natural, bo rehole and boiler feed water based on the concept of flow injection with a calcium-selective membrane electrode as sensor is described. The system is suitable for the on-site monitoring of calcium at a sampling rate of 60 sam ples per hour in the linear range 10(-4)-10(-2) mol l(-1)(approximately 4-4 00 mg l(-1)) with an RSD better than 0.7%. The detection limit of the syste m is 2.1 x 10(-6) mol l(-1) (about 0.084 mg l(-1)).