2018-05-182018-05-182015-05DAMASCENO, Deangelis et al. Análise multivariada de imagens na química: um experimento para determinação do ph de águas potáveis. Quimica Nova, São Paulo, v. 38, n. 6, p. 836-841, maio 2015.0100-4042e- 1678-7064http://repositorio.bc.ufg.br/handle/ri/15026A Multivariate Image Analysis (MIA) laboratory activity was proposed estimating pH of drinking water samples from its digital images after adding bromothymol blue as a pH indicator, and using the PLS multivariate calibration method. All computational work was done using GNU Octave free software. The MIA-PLS based approach exemplified with drinking water pH estimates is tailored to meet the needs of both students and researchers. MIA-PLS method was statically equivalent to the reference method using a conventional glass pH electrode. This lab activity combines analytical methodology, computing, and chemometrics.porAcesso AbertoMIAPLSDrinking waterDigital image processingPHArtigo10.5935/0100-4042.20150082