"Periodic-table-style" paper device for monitoring heavy metals in water

Miaosi Li, Rong Cao, Azadeh Nilghaz, Liyun Guan, Xiwang Zhang, Wei Shen

Research output: Contribution to journalArticleResearchpeer-review

103 Citations (Scopus)


If a paper-based analytical device (?-PAD) could be made by printing indicators for detection of heavy metals in chemical symbols of the metals in a style of the periodic table of elements, it could be possible for such ?-PAD to report the presence and the safety level of heavy metal ions in water simultaneously and by text message. This device would be able to provide easy solutions to field-based monitoring of heavy metals in industrial wastewater discharges and in irrigating and drinking water. Text-reporting could promptly inform even nonprofessional users of the water quality. This work presents a proof of concept study of this idea. Cu(II), Ni(II), and Cr(VI) were chosen to demonstrate the feasibility, specificity, and reliability of paper-based text-reporting devices for monitoring heavy metals in water.
Original languageEnglish
Pages (from-to)2555 - 2559
Number of pages5
JournalAnalytical Chemistry
Issue number5
Publication statusPublished - 3 Mar 2015

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