Quantitative NIR-Raman analysis of methyl-parathion pesticide microdroplets on aluminum substrates.
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.
Sato-Berrú
R Ysacc
RY
Centro de Investigaciones en Optica, A.C., Unidad Aguascalientes, Prolongación Constitución 607, Reserva Loma Bonita, C.P. 20200, Aguascalientes, Mexico. roys_la@yahoo.com
Medina-Valtierra
Jorge
J
Medina-Gutiérrez
Cirilo
C
Frausto-Reyes
Claudio
C
D000535:Aluminum; D003627:Data Interpretation, Statistical; D007306:Insecticides / Q000737:chemistry*; D008743:Methyl Parathion / Q000737:chemistry*; D019265:Spectroscopy, Near-Infrared; D013059:Spectrum Analysis, Raman
D007306:Insecticides; D008743:Methyl Parathion; D000535:Aluminum