| タイトル | Application of Colorimetric Solid Phase Extraction (C-SPE) to Monitoring Nickel(II) and Lead(II) in Spacecraft Water Supplies |
| 本文（外部サイト） | http://hdl.handle.net/2060/20050217258 |
| 著者（英） | Mudgett, Paul; Diaz, Neil C.; Porter, Marc D.; Gazda, Daniel B.; Schultz, John; Rutz, Jeff; Fritz, James S. |
| 著者所属（英） | Ames Lab. |
| 発行日 | 2004-01-01 |
| 言語 | eng |
| 内容記述 | Archived water samples collected on the International Space Station (ISS) and returned to Earth for analysis have, in a few instances, contained trace levels of heavy metals. Building on our previous advances using Colorimetric Solid Phase Extraction (C-SPE) as a biocide monitoring technique, we are devising methods for the low level monitoring of nickel(II), lead(II) and other heavy metals. C-SPE is a sorption-spectrophotometric platform based on the extraction of analytes onto a membrane impregnated with a colorimetric reagent that are then quantified on the surface of the membrane using a diffuse reflectance spectrophotometer. Along these lines, we have determined nickel(II) via complexation with dimethylglyoxime (DMG) and begun to examine the analysis of lead(II) by its reaction with 2,5- dimercapto-1,3,4-thiadiazole (DMTD) and 4-(2- pyridylazo)-resorcinol (PAR). These developments are also extending a new variant of C-SPE in which immobilized reagents are being incorporated into this methodology in order to optimize sample reaction conditions and to introduce the colorimetric reagent. This paper describes the status of our development of these two new methods. |
| NASA分類 | Space Processing |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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