Jerry James Stone writes "NASA and University of Utah chemists are developing advanced tech for testing the drinkability of water. The process just began a six-month run aboard the International Space Station. Water will be sampled either from the Space Station's or Shuttle's galley using a syringe. It is then forced through a chemically-imbued membrane, which changes color based on toxicity. The process itself will take about two minutes. It checks drinking water for iodine and silver, which are used to kill unwanted microbes."
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