An analytical method for determination of azoxystrobin, cyproconazole, deltamethrin, epoxiconazole, kresoxim-methyl, and penconazole in rice, using QuEChERS extraction and a gas chromatography, was validated. Recoveries ranged within the 98.9–107.8 % range for all pesticides. Limits of detection and of quantification were 0.27 and 0.90 μg/kg for azoxystrobin, 0.26 and 0.88 μg/kg for cyproconazole, 0.25 and 0.84 μg/kg for deltametrhin, 0.22 and 0.72 μg/kg for epoxiconazole, 0.22 and 0.73 μg/kg for kresoxim-methyl and 0.23 and 0.77 μg/kg for penconazole, respectively. The expanded measurement uncertainty was lower than 20% for all pesticides. The occurrence of these pesticides was evaluated in 100 rice samples commercialised in different supermarkets. Residues of at least two pesticides simultaneously were found in 94 samples. The concentrations were lower than European and Argentinean legislative limits, with exception of epoxiconazole that in 36 rice samples was found in concentrations above the limit established in Argentina.

验证了使用QuEChERS萃取和气相色谱法测定大米中嘧菌酯，环丙康唑，溴氰菊酯，环氧松唑，克雷索辛甲基和戊康唑的分析方法。所有农药的回收率在98.9-107.8％范围内。嘧菌酯的检出限和定量限分别为0.27和0.90μg/ kg，环丙康唑为0.26和0.88μg/ kg，δmetrhin分别为0.25和0.84μg/ kg，环氧异环唑为0.22和0.72μg/ kg，0.22和0.73μg/ kg戊唑醇的浓度为kresoxim-methyl，分别为0.23和0.77μg/ kg。所有农药的扩展测量不确定度均低于20％。在不同超市购买的100个大米样品中评估了这些农药的存在。在94个样品中同时发现了至少两种农药的残留。