QUALITY CONTROL OF BLENDS DIESEL:BIODIESEL USIN A SMARTPHONE

Abstract

The use of electronic devices can be an innovative alternative to ensure quality and safety in chemical analysis. There are numerous reports depicting fraud or adulteration of food, beverages, documents, fuels, among other matrices. Cases of fraud and tampering are commonplace and occur sharply in several countries. Therefore, the quality control of these products is of paramount importance and studies must be carried out constantly to monitor the sophistication of these frauds/adulterations. Some classic methods can be subjective and have little selectivity, so analyses that ensure reliability, simplicity and low operating cost are essential for monitoring the authenticity of these products. Thus, we can report to colorimetric analyses involving the RGB system related to chemometric analysis of images (MIA) associated with smartphones that see being used in several areas such as agriculture, medicine, forensic chemistry, among others. Therefore, the work proposes a new methodology for the quantification of biodiesel in diesel/biodiesel mixtures using thin layer chromatography (CCD) combined with chemometric treatments with smartphone application. In the study, the application instruments, type of support, mobile phase, pattern volume/sample and means of revelation of the chromatographic plate were evaluated, in addition to relating the results obtained with the reference method (infrared spectroscopy in the region of the next) by statistical test. The results obtained show the potential of the use of digital images as a means for biodiesel quantification, since they presented excellent values of R², RMSEC, LD and LQ (0.97; 0.77; 2.6; 0.08 and 0.26% m/m).