Handheld colorimeter for determination of heavy metal concentrations

A portable instrument that measures heavy metal concentration from a colorimetric sensor array is presented. The use of eight sensing membranes, placed on a plastic support, allows to obtain the hue component of the HSV colour space of each one in order to determinate the concentration of metals pre...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 307; no. 1; pp. 12037 - 6
Main Authors Ruiz, N López, Ariza, M, Olmos, A Martínez, Vukovic, J, Palma, A J, Capitan-Vallvey, L F
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2011
Subjects
Color
Colorimetry
Colour
Heavy metals
Image processing
Microcontrollers
Physics
Portability
Screens
Sensor arrays
Touch
User interfaces
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Summary:A portable instrument that measures heavy metal concentration from a colorimetric sensor array is presented. The use of eight sensing membranes, placed on a plastic support, allows to obtain the hue component of the HSV colour space of each one in order to determinate the concentration of metals present in a solution. The developed microcontroller-based system captures, in an ambient light environment, an image of the sensor array using an integrated micro-camera and shows the picture in a touch micro-LCD screen which acts as user interface. After image-processing of the regions of interest selected by the user, colour and concentration information are displayed on the screen.
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ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/307/1/012037