Document Type

Article

Publication Date

7-1-2010

Subjects

Organic water pollutants -- Analysis, Water -- Carbon content -- Measurement, International Space Station -- Equipment and supplies -- Evaluation

Abstract

The International Space Station (ISS) total organic carbon analyzer (TOCA) is designed to autonomously assess recovered water quality by providing an indication of total organic carbon (TOC). The current TOCA has been on the ISS since November 2008. Functional checkout and operations revealed complex operating considerations. Specifically, failure of the hydrogen (H2) catalyst resulted in development of an innovative oxidation analysis method. This method reduces activation time and limits the H2 produced during analysis, while retaining the ability to indicate TOC concentrations within 25% accuracy. Subsequent testing and comparison to archived samples returned from the station and tested on the ground yield high confidence in this method, and in the quality of the recovered water.

Description

This is the author's version of a paper presented to the 40th International Conference on Environmental Systems, Barcelona, Spain, 2010. Final version may be found at http://arc.aiaa.org/doi/abs/10.2514/6.2010-6043

DOI

10.2514/6.2010-6043

Persistent Identifier

http://archives.pdx.edu/ds/psu/9349

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