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Journal Article 
Iron (III) determination in bioethanol fuel using a smartphone-based device 
Joao, AF; Squissato, AL; Fernandes, GM; Cardoso, RM; Batista, AD; Munoz, RAA 
2019 
Microchemical Journal
ISSN: 0026-265X
EISSN: 1095-9149 
146 
1134-1139 
Digital images; RGB matrices; Fuel ethanol; Colorimetric; Smartphone-device