MULTIVARIATE IMAGE ANALYSIS IN CHEMISTRY: pH MEASUREMENTS OF DRINKING WATER | Zendy

Deangelis Damasceno | Zendy; Thiago Gomes Toledo | Zendy; Mariana S. Godinho | Zendy; Cassiano P. da Silva | Zendy; Sérgio Botelho de Oliveira | Zendy; Anselmo E. de Oliveira | Zendy

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MULTIVARIATE IMAGE ANALYSIS IN CHEMISTRY: pH MEASUREMENTS OF DRINKING WATER

Author(s) -

Deangelis Damasceno,

Thiago Gomes Toledo,

Mariana S. Godinho,

Cassiano P. da Silva,

Sérgio Botelho de Oliveira,

Anselmo E. de Oliveira

Publication year - 2015

Publication title -

química nova

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.214

H-Index - 73

eISSN - 1678-7064

pISSN - 0100-4042

DOI - 10.5935/0100-4042.20150082

Subject(s) - multivariate statistics , multivariate analysis , chemistry , environmental chemistry , water chemistry , mathematics , statistics

A 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.

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