title: Quantitative NIR-Raman analysis of methyl-parathion pesticide microdroplets on aluminum substrates.
abstract: The potential of Raman spectroscopy in the quantitative analysis of dilute organic contaminants on aluminum substrates is evidenced in this work. Methyl-parathion microdroplets, an organophosphorus pesticide, has been used as a probe for this purpose. The samples were analyzed on an aluminum foil, which is very easy to acquire and to adapt. Moreover, aluminum foil does not need a previous treatment. Linear and no-linear curves as a function of the concentration of methyl-parathion versus the Raman intensity of the 1345 and 1110 cm(-1) peaks were established by means of a simple mathematical expression. A comparison with calibration curves fits very well, allowing quantification at concentration levels as low as parts per million.
authors.affiliation: Centro de Investigaciones en Optica, A.C., Unidad Aguascalientes, Prolongación Constitución 607, Reserva Loma Bonita, C.P. 20200, Aguascalientes, Mexico. roys_la@yahoo.com
authors.forename: R Ysacc
authors.initials: RY
authors.lastname: Sato-Berrú
authors.forename: Jorge
authors.initials: J
authors.lastname: Medina-Valtierra
authors.forename: Cirilo
authors.initials: C
authors.lastname: Medina-Gutiérrez
authors.forename: Claudio
authors.initials: C
authors.lastname: Frausto-Reyes
mesh_terms: D000535:Aluminum; D003627:Data Interpretation, Statistical; D007306:Insecticides / Q000737:chemistry*; D008743:Methyl Parathion / Q000737:chemistry*; D019265:Spectroscopy, Near-Infrared; D013059:Spectrum Analysis, Raman
chemical_list: D007306:Insecticides; D008743:Methyl Parathion; D000535:Aluminum