UK scientists have developed a mobile phone-based system to help people avoid drinking water contaminated with arsenic.1 The phone’s camera measures quantum dot fluorescence in response to arsenic, achieving a limit of detection as low as 5μM.
Approximately 57 million people worldwide encounter As(III) concentrations exceeding the World Health Organization (WHO) recommended maximum of 10μg/L on a regular basis. Chronic exposure to this well known carcinogen and poison, which binds to proteins and impairs cell function, is one of the largest environmental health disasters in the world. Finding a portable, easy-to-use method to measure levels of this most toxic form of arsenic in drinking water is therefore vital.
A step towards Mobile Arsenic measurement for surface waters
Camille Ann De Villiers, Marta C Lapsley and Elizabeth A H Hall
Analyst, 2015, Accepted Manuscript