title: Determination of cadmium in alcohol fuel using Moringa oleifera seeds as a biosorbent in an on-line system coupled to FAAS.
abstract: In this study a new method for determination of cadmium in alcohol fuel using Moringa oleifera seeds as a biosorbent in an on-line preconcentration system coupled to flame atomic absorption spectrometry (FAAS) was developed. Flow and chemical variables of the proposed system were optimized through multivariate designs. The limit of detection for cadmium was 5.50microg L(-1) and the precision was below 2.3% (35.0microg L(-1), n=9). The analytical curve was linear from 5 to 150microg L(-1), with a correlation coefficient of 0.9993. The developed method was successfully applied to spiked alcohol fuel, and accuracy was assessed through recovery tests, with recovery ranging from 97.50 to 100%.
authors.affiliation: Instituto de Química, Universidade Federal de Uberlândia, Uberlândia 38400-902, MG, Brazil.
authors.forename: Vanessa Nunes
authors.initials: VN
authors.lastname: Alves
authors.forename: Rafael
authors.initials: R
authors.lastname: Mosquetta
authors.forename: Nívia Maria Melo
authors.initials: NM
authors.lastname: Coelho
authors.forename: Joyce Nunes
authors.initials: JN
authors.lastname: Bianchin
authors.forename: Kalya Cravo
authors.initials: KC
authors.lastname: Di Pietro Roux
authors.forename: Edmar
authors.initials: E
authors.lastname: Martendal
authors.forename: Eduardo
authors.initials: E
authors.lastname: Carasek
mesh_terms: D000438:Alcohols / Q000737:chemistry*; D053000:Analytic Sample Preparation Methods / Q000379:methods*; D056804:Biofuels / Q000032:analysis*; D002104:Cadmium / Q000032:analysis* / Q000302:isolation & purification* / Q000378:metabolism; D029588:Moringa oleifera / Q000378:metabolism*; D009862:Online Systems; D015203:Reproducibility of Results; D012639:Seeds / Q000378:metabolism*; D013054:Spectrophotometry, Atomic
chemical_list: D000438:Alcohols; D056804:Biofuels; D002104:Cadmium