title: A simple method based on the application of a CCD camera as a sensor to detect low concentrations of barium sulfate in suspension.
abstract: The development of a simple, rapid and low cost method based on video image analysis and aimed at the detection of low concentrations of precipitated barium sulfate is described. The proposed system is basically composed of a webcam with a CCD sensor and a conventional dichroic lamp. For this purpose, software for processing and analyzing the digital images based on the RGB (Red, Green and Blue) color system was developed. The proposed method had shown very good repeatability and linearity and also presented higher sensitivity than the standard turbidimetric method. The developed method is presented as a simple alternative for future applications in the study of precipitations of inorganic salts and also for detecting the crystallization of organic compounds.
authors.affiliation: Universidade Federal do Rio de Janeiro, Instituto de Química, Avenida Athos da Silveira Ramos, 149 Bloco A-7 andar, Rio de Janeiro, 21941-909, Brazil. rcsena@inmetro.gov.br
authors.forename: Rodrigo Caciano
authors.initials: RC
authors.lastname: de Sena
authors.forename: Matheus
authors.initials: M
authors.lastname: Soares
authors.forename: Maria Luiza Oliveira
authors.initials: ML
authors.lastname: Pereira
authors.forename: Rogério Cruz Domingues
authors.initials: RC
authors.lastname: da Silva
authors.forename: Francisca Ferreira
authors.initials: FF
authors.lastname: do Rosário
authors.forename: Joao Francisco Cajaiba
authors.initials: JF
authors.lastname: da Silva