Ammonia is a soluble alkaline gas. It is a highly toxic chemical substance and common in biological processes. In human and animals, gas ammonia might affect the health status and might becoming fatal in very high concentration. The objective of this invention is to detect and warn against gas ammonia using a simple step, low-cost tool. The utility compositions of AmTell are made up of indicators which change color when exposed to varying concentrations of gas ammonia. AmTell has the advantage of being easy to use, a short testing time, easy color observation, rapid response, with no professional assistance required.
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