Ultrapure water total organic carbon analyzer - Advanced component development
Abstract
A reagentless separator and other on-line gravity-independent components for the analysis of total organic carbon (TOC) in Space Station water are investigated. The designs and characteristics are described for the reagentless separator, passive total inorganic carbon (TIC) removal, and for the TOC/TIC functional check module. The TOC analyzer removes TIC by acidification and oxidizes the organics and measures CO2, and test results are given for solid-phase acids and challenge tests of TIC and organic/inorganic levels. The prototypes of the reagentless separator are found to remove TIC from sample water to low ppb levels with low levels of organic contaminant loss. The optimal configuration includes a solid-phase inorganic acid integrated with a hydrophobic hollow-fiber membrane degasser which acidifies the water and removes carbon in one step. The TOC/TIC functional check module is shown to be effective and capable of imparting 10 mg/1 TOC to an influent stream as a TOC standard.
- Publication:
-
IN: Spacecraft water quality: Maintenance and monitoring; Proceedings of the 21st International Conference on Environmental Systems
- Pub Date:
- 1991
- Bibcode:
- 1991swqm.proc..131J
- Keywords:
-
- Analyzers;
- Carbon;
- Closed Ecological Systems;
- Contaminants;
- Spacecraft Environments;
- Water Quality;
- Carbon Dioxide Concentration;
- Carbon Dioxide Removal;
- Chemisorption;
- Life Support Systems;
- Spare Parts;
- Water Treatment;
- Instrumentation and Photography