Public domain
Space Science
From the collection of NASA Image and Video Library. Free to download, adapt and use — no permission needed.
About this work
The heart of a colorimetric solid phase extractor (CSPE) test kit quickly measures the concentration of the biocides silver or iodine in astronauts’ drinking water to determine whether concentrations are safe. When 10 milliliters (ml) of water is drawn through the disk, the disk will turn color (yellow in this picture for iodine) indicating the presence of the biocides. The device could someday be used to test water safety at reservoirs and water treatment plants on Earth.
NASA Image and Video Library’s own descriptionCredit lineSpace Science. NASA/MSFC, 2003-06-07. Public domain. ID: 0700433.
