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Colorimetric Solid Phase Extraction for the Measurement of Total I (Iodine, Iodide, and Triiodide) in Spacecraft Drinking WaterAn experimental drinking water monitoring kit for the measurement of iodine and silver(I) was recently delivered to the International Space Station (ISS). The kit is based on Colorimetric Solid Phase Extraction (CSPE) technology, which measures the change in diffuse reflectance of indicator disks following exposure to a water sample. To satisfy additional spacecraft water monitoring requirements, CSPE has now been extended to encompass the measurement of total I (iodine, iodide, and triiodide) through the introduction of an oxidizing agent, which converts iodide and triiodide to iodine, for measurement using the same indicator disks currently being tested on ISS. These disks detect iodine, but are insensitive to iodide and triiodide. We report here the operational considerations, design, and ground-based performance of the CSPE method for total I. The results demonstrate that CSPE technology is poised to meet NASA's total I monitoring requirements.
Document ID
20090040624
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Lipert, Robert J.
(Iowa State Univ. Ames, IA, United States)
Porter, Marc D.
(Utah Univ. Salt Lake City, UT, United States)
Siperko, Lorraine M.
(Utah Univ. Salt Lake City, UT, United States)
Gazda, Daniel B.
(Wyle Integrated Science and Engineering Group Houston, TX, United States)
Rutz, Jeff A.
(Wyle Integrated Science and Engineering Group Houston, TX, United States)
Schultz, John R.
(Wyle Integrated Science and Engineering Group Houston, TX, United States)
Carrizales, Stephanie M.
(NASA Johnson Space Center Houston, TX, United States)
McCoy, J. Torin
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
September 8, 2013
Publication Date
January 1, 2009
Subject Category
Chemistry And Materials (General)
Report/Patent Number
JSC-CN-19304
Meeting Information
Meeting: 40th International Conference on Environmental Systems
Location: Barcelona
Country: Spain
Start Date: July 11, 2010
End Date: July 15, 2010
Distribution Limits
Public
Copyright
Other

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