Development and validation of an environmentally friendly attenuated total reflectance in the mid-infrared region method for the determination of ethanol content in used engine lubrication oil

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dc.contributor.authorHatanaka, Rafael Rodrigues
dc.contributor.authorSequinel, Rodrigo
dc.contributor.authorGualtieri, Carlos Eduardo
dc.contributor.authorTercini, Antônio Carlos Bergamaschi
dc.contributor.authorFlumignan, Danilo Luiz
dc.contributor.authorde Oliveira, José Eduardo
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:28:40Z
dc.date.available2014-05-27T11:28:40Z
dc.date.issued2013-03-14
dc.description.abstractLubricating oils are crucial in the operation of automotive engines because they both reduce friction between moving parts and protect against corrosion. However, the performance of lubricant oil may be affected by contaminants, such as gasoline, diesel, ethanol, water and ethylene glycol. Although there are many standard methods and studies related to the quantification of contaminants in lubricant oil, such as gasoline and diesel oil, to the best of our knowledge, no methods have been reported for the quantification of ethanol in used Otto cycle engine lubrication oils. Therefore, this work aimed at the development and validation of a routine method based on partial least-squares multivariate analysis combined with attenuated total reflectance in the mid-infrared region to quantify ethanol content in used lubrication oil. The method was validated based on its figures of merit (using the net analyte signal) as follows: limit of detection (0.049%), limit of quantification (0.16%), accuracy (root mean square error of prediction=0.089% w/w), repeatability (0.05% w/w), fit (R 2 =0.9997), mean selectivity (0.047), sensitivity (0.011), inverse analytical sensitivity (0.016% w/w-1) and signal-to-noise ratio (max: 812.4 and min: 200.9). The results show that the proposed method can be routinely implemented for the quality control of lubricant oils. © 2013 Elsevier B.V. All rights reserved.en
dc.identifierhttp://dx.doi.org/10.1016/j.talanta.2013.02.047
dc.identifier.citationTalanta.
dc.identifier.doi10.1016/j.talanta.2013.02.047
dc.identifier.issn0039-9140
dc.identifier.scopus2-s2.0-84874769169
dc.identifier.urihttp://hdl.handle.net/11449/74827
dc.identifier.wosWOS:000319089100027
dc.language.isoeng
dc.relation.ispartofTalanta
dc.relation.ispartofjcr4.244
dc.relation.ispartofsjr1,186
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectEthanol content
dc.subjectInfrared spectroscopy
dc.subjectLubrication oil
dc.subjectValidation
dc.titleDevelopment and validation of an environmentally friendly attenuated total reflectance in the mid-infrared region method for the determination of ethanol content in used engine lubrication oilen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy

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