Litmus-like sensor could detect chemical weapons

The paper strips are designed to change from blue to pink within 30 seconds of exposure to even trace amounts of nerve gas.

Source: http://news.cnet.com/8301-27083_3-57396604-247/litmus-like-sensor-could-detect-chemical-weapons/?part=rss&subj=news&tag=2547-1_3-0-20

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