title: Validation of LED spectrofluorimeter for determination of both biodiesel and nontransesterified residual cooking oil in diesel samples.
abstract: This paper presents the results of the validation of a LED spectrofluorimeter patented for the analysis of biodiesel in diesel and non-transesterified residual cooking oil (RCO) in diesel. Detection limit, quantification limit and sensitivity were determined from the regression lines. The spectrofluorimeter validated in this study was adequate for quantifying the amount of biodiesel in diesel in the range from 2% to 45% (B02-B45) with an R-squared value of 0.9962 and a detection limit of 3%. For the analysis of non-transesterified RCO in diesel, the linear range was from 2% to 20% with an R-squared value of 0.9872 and a detection limit of 2%. The accuracy of the equipment for the analysis of biodiesel in diesel and non-transesterified RCO in diesel was evaluated using Student's t-test for paired data. With 95% confidence level there was no significant difference between the actual values and those determined by the equipment.
authors.affiliation: Instituto de Educação, Ciência e Tecnologia da Bahia, Campus de Simões Filho, BA CEP 43.700-000, Brazil. Electronic address: marilenameira@gmail.com.
authors.forename: Marilena
authors.initials: M
authors.lastname: Meira
authors.affiliation: Instituto de Química, Universidade Federal da Bahia, Campus de Ondina, Salvador, BA CEP: 40.170-290, Brazil.
authors.forename: Cristina M
authors.initials: CM
authors.lastname: Quintella
authors.affiliation: Universidade Tecnológica Federal do Paraná, Campus Curitiba, Av. Sete de Setembro, 3165, Rebouças, Curitiba, PR CEP 80230-910, Brazil.
authors.forename: Pedro Ramos
authors.initials: PR
authors.lastname: Costa Neto
authors.affiliation: Instituto de Física, Universidade Federal da Bahia, Campus de Ondina, Salvador, BA CEP: 40.170-115, Brazil.
authors.forename: Iuri M
authors.initials: IM
authors.lastname: Pepe
authors.affiliation: Instituto de Química, Universidade Federal da Bahia, Campus de Ondina, Salvador, BA CEP: 40.170-290, Brazil.
authors.forename: Erika M de O
authors.initials: EM
authors.lastname: Ribeiro
authors.affiliation: Instituto de Química, Universidade Federal da Bahia, Campus de Ondina, Salvador, BA CEP: 40.170-290, Brazil.
authors.forename: Weidson Leal
authors.initials: WL
authors.lastname: Silva
authors.affiliation: Instituto de Química, Universidade Federal da Bahia, Campus de Ondina, Salvador, BA CEP: 40.170-290, Brazil.
authors.forename: Alexandre Lopes Del
authors.initials: AL
authors.lastname: Cid
authors.affiliation: Instituto de Química, Universidade Federal da Bahia, Campus de Ondina, Salvador, BA CEP: 40.170-290, Brazil.
authors.forename: Alexandre Kamei
authors.initials: AK
authors.lastname: Guimarães
mesh_terms: D056804:Biofuels / Q000032:analysis*; D004042:Dietary Fats, Unsaturated / Q000032:analysis*; D005742:Gasoline / Q000032:analysis*; D057230:Limit of Detection; D013050:Spectrometry, Fluorescence / Q000379:methods*
chemical_list: D056804:Biofuels; D004042:Dietary Fats, Unsaturated; D005742:Gasoline
keywords: Adulteration; Biodiesel–diesel blends; LED spectrofluorimeter; Non-transesterified residual cooking oil (RCO); Validation