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Abstract
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It is necessary to monitor pollutants in the aquatic environment to satisfy the requirements of legislative frameworks and directives, as many of those compounds can pose a threat to both human health and ecosystems. In the last decades, the number of articles published about determination of different pollutants based on the use of low cost instrumentations such as mobile phones or flatbed scanners has increased. This article presented an overview of such articles. In the investigated articles, a digital picture of the colored sample solution was taken by ordinary household imaging devices. The integration value of photos was read by image processing software and the quantitative relation between color space value and concentration can be established. Different multivariate calibration method based on RGB color space, HSI color space and gray intensity histograms were developed. Up to now, different pollutants such as heavy metals (e.g. Hg2+, Pb2+, Ni2+, Co2+, Zn2+, Cd2+), nitrite, nitrate, ammonium, amino acids, hydrazine, hydrogen peroxide, phosphate, chloride, and hydrogen sulfide have been determined by the explained method using household imaging devices. Thus, analysis of literature data showed a prospective viability of using household imaging devices in quantitative chemical analysis. Important advantages of household color registration devices are the capability of operating with both liquid and solid forms, low cost, ease of use, and accessibility to a wide range of consumers.
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