title: Degradation of the insecticide azinphos methyl in orange and peach juices during storage at different temperatures.
abstract: The degradation of azinphos methyl in orange and peach juice was studied. The insecticide was aseptically added to packed orange and peach juices and stored at 40, 20 and 0 degrees C. Samples were removed at regular intervals and were analysed for residues of azinphos methyl. Residues were determined with a simple gas-chromatographic method using a 30 m glass capillary column and an NP detector. The recoveries of azinphos methyl were 87-110% for orange juice and 92-108% for peach juice, and the limit of determination was 0.004 mg/kg for both juices. From the experimental data, rate constants, half-lives, and times needed to reach legal limits for the decomposition of azinphos methyl in orange and peach juices were evaluated. Half lives for orange and peach juices were 6.5 and 7.8 days at 40 degrees C, 86.6, and 92.4 days at 20 degrees C, and 407.7 and 495.1 days at 0 degrees C, respectively.
authors.affiliation: Agricultural University of Athens, Department of Food Science and Technology, Votanikos, Greece. gche2kim@auadec.aua.gr
authors.forename: N B
authors.initials: NB
authors.lastname: Kyriakidis
authors.forename: P E
authors.initials: PE
authors.lastname: Athanasopoulos
authors.forename: T
authors.initials: T
authors.lastname: Karamanolis
mesh_terms: D001387:Azinphosmethyl / Q000737:chemistry*; D001628:Beverages / Q000032:analysis*; D002849:Chromatography, Gas; D004350:Drug Residues / Q000737:chemistry*; D005638:Fruit / Q000737:chemistry*; D006207:Half-Life; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007306:Insecticides / Q000737:chemistry*; D008452:Maximum Allowable Concentration; D013696:Temperature; D013997:Time Factors
chemical_list: D007306:Insecticides; D001387:Azinphosmethyl