%0 Journal Article %T Desarrollo y validaci¨®n de una metodolog¨ªa para la determinaci¨®n de residuos de orto-fenilfenol en aceite esencial de frutas c¨ªtricas en Tucum¨¢n, R. Argentina %A Kamiya %A Norma %A Lacina %A Marina %A Tolosa %A Diego %A Contreras %A Christian %A Lagoria %A Sergio %A Ruiz %A Roberto M. %J Revista industrial y agr£¿-cola de Tucum£¿£¿n %D 2010 %I Scientific Electronic Library Online %X the essential oils of citric fruits constitute complex mixtures of organic compounds which interfere with pesticide residues quantitation. as there exists scarce bibliography on ortho-phenylphenol (opp) determination in this commodity, the present work aims to adapt, develop and validate a simple and cheaper method for determining phenylphenol residues in citrus essential oil, while certifying it under iram 301 standard (iso/iec 17025:2005). citrus fruit analysis methods were used, taking advantage of opp acidity for its extraction from the commodity by simple acid-base extraction. later, gas chromatography with flame ionization detector (gc-fid) was used for detection and quantitation. average recoveries were the following: 89% to 104% within the range of 0.1 mg/kg to 100 mg/kg for lemon essential oil; 93% to 103% and 90% to 114%, for white and red grapefruit, respectively, within the range of 0.2 -10 mg/kg. detection limits were 0.05 mg/kg for lemon essential oil and 0.1 mg/kg for both white and red grapefruit essential oils. quantitation limits were 0.1 and 0.2 mg/kg for lemon and grapefruit essential oils, respectively. also, an acceptable linearity was observed in the evaluated ranges and relative uncertainties of 24%, 14% and 23% for lemon, white and red grapefruit essential oils, respectively, were obtained. %K opp %K pesticide %K citric fruits %K chromatography. %U http://www.scielo.org.ar/scielo.php?script=sci_abstract&pid=S1851-30182010000200005&lng=en&nrm=iso&tlng=en