Mcr-als Applied To The Quantitative Monitoring Of The Electrodegradation Process Of Atrazine Using Uv Spectra: Comparative Results With Hplc-dad As A Reference Method

dc.creatorSouza
dc.creatorThalisson S.; Zanin
dc.creatorHudson G.; Peterlevitz
dc.creatorAlfredo; Baranauskas
dc.creatorVitor; da Silva
dc.creatorGilmare A.; Reis
dc.creatorCesar; Reis
dc.creatorEfraim L.; Teofilo
dc.creatorReinaldo F.
dc.date2016
dc.datefev
dc.date2017-11-13T11:35:20Z
dc.date2017-11-13T11:35:20Z
dc.date.accessioned2018-03-29T05:49:26Z
dc.date.available2018-03-29T05:49:26Z
dc.identifierQuimica Nova. Soc Brasileira Quimica, v. 39, p. 137 - 145, 2016.
dc.identifier0100-4042
dc.identifier1678-7064
dc.identifierWOS:000373993400004
dc.identifier10.5935/0100-4042.20160006
dc.identifierhttp://www.scielo.br/scielo.php?pid=S0100-40422016000200137&script=sci_arttext
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/326600
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1363606
dc.descriptionElectrodegradation of atrazine in water was performed using homemade (PA and PB) and purchased (PC) boron-doped diamond anodes. The degradation was monitored off-line by analyzing total organic carbon and high performance liquid chromatography with diode array detector (HPLC-DAD) and at-line by UV spectroscopy. The spectra were recorded every 2 min. The rank deficiency problem was resolved by assembling an augmented column-wise matrix. HPLC was employed to separate the original and byproducts degradation components. Aiming the same goal, multivariate curve resolution - alternating least squares (MCR-ALS) was applied to resolve the UV spectroscopic data. Comparison between HPLC and MCR-ALS separations is presented. By using MCR-ALS the spectra of atrazine and two byproducts were successfully resolved and the resulted concentration profiles properly represented the system studied. The ALS explained variance (R-2) for PA, PB and PC was equal to 99.99% for all of them and the lack of fit for PA, PB and PC were 0.39, 0.34 and 0.54 respectively. The correlation (R) between the recovered and pure spectra were calculate for each electrodegradation, validating the MCR-ALS results. The average R was equal to 0.997. The spectral and concentration profiles described with this new approach are in agreement with HPLC-DAD results. The proposed method is an alternative to classical analyses for monitoring of the degradation process, mainly due to the simplicity, fast results and economy.
dc.description39
dc.description2
dc.description137
dc.description145
dc.languagePortuguese
dc.publisherSoc Brasileira Quimica
dc.publisherSão Paulo
dc.relationQuimica Nova
dc.rightsaberto
dc.sourceWOS
dc.subjectElectrodegradation
dc.subjectBoron-doped Diamond
dc.subjectAtrazine
dc.subjectMultivariate Curve Resolution-alternating Least Squares
dc.subjectMcr-als
dc.titleMcr-als Applied To The Quantitative Monitoring Of The Electrodegradation Process Of Atrazine Using Uv Spectra: Comparative Results With Hplc-dad As A Reference Method
dc.typeArtículos de revistas


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