REMOVAL OF DISSOLVED-OXYGEN FROM WATER - A COMPARISON OF 4 COMMON TECHNIQUES

Authors
BUTLER IB SCHOONEN MAA RICKARD DT
Citation
Ib. Butler et al., REMOVAL OF DISSOLVED-OXYGEN FROM WATER - A COMPARISON OF 4 COMMON TECHNIQUES, Talanta, 41(2), 1994, pp. 211-215
Citations number
16
Journal title
Talanta
ISSN journal
00399140 → ACNP
Volume
41
Issue
2
Year of publication
1994
Pages
211 - 215
Database
ISI
SICI code
0039-9140(1994)41:2<211:RODFW->2.0.ZU;2-Z
Abstract
Four common techniques for the removal of dissolved oxygen from water have been examined: boiling at 1 atm, boiling under reduced pressure, purging with N2 and sonication under reduced pressure. After treatment , the residual oxygen in solution was analysed by the Winkler method. Nitrogen purging for 20-40 min at flow rate of 25 mL/s was found to be the most effective oxygen removal method. Boiling at 1 atm was found to be the least effective. None of the techniques evaluated here lead to complete removal of oxygen. The concentration of residual dissolved oxygen after purging for 20-40 minutes with nitrogen is 0.2-0.4 ppm.