Compound Aldrin Azoxystrobin Bifenthrin Bitertanol Bromopropylate Bupirimate Chlordanea Captan Chlorothalonil Chlorfenvinphos Chlorpyrifos Chlorpyrifos methyl Cyﬂuthrin Cypermethrin Cyprodinil DDVP DDxb Deltamethrin Diazinon Dichloﬂuanid Dieldrin Dimethoate Diphenylamine DMDTc Endosulfan a Endosulfan b Endosulfan sulfate Endrin Ethion Etrimfos Fenarimol Fenitrotion Fenvalerate ? Esfenvalerated Flusilazole Folpet HCB HCHe 0.04 0.1 0.1 0.1 0.1 0.1 0.08 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.4 0.1 0.1 0.1 0.04 0.1 0.1 0.4 0.1 0.1 0.1 0.04 0.1 0.1 0.1 0.1 0.4 0.1 0.1 0.02 0.1 70 85 129 113 92 97 74 39 100 94 86 102 108 111 91 82 79 136 96 102 82 88 100 116 96 87 100 91 103 102 97 104 123 103 34 53 94 11 9 4 7 8 8 11 19 9 8 6 9 5 3 7 7 5 9 8 14 14 2 11 9 13 9 8 10 10 10 10 2 5 9 14 13 4 Heptachlor Heptachlor epoxide Kresoxim methyl l-Cyhalothrin Malathion Mecarbam Metalaxyl Methiocarb Methidathion Myclobutanil Nitrofen Oxadixyl Parathion Parathion methyl Pendimethalin Permethrin Phosalone Phosmet Picoxystrobin Pyrimethanil Pirimicarb Procymidone Propachlor Propargite Propoxur Propyzamide Pirimiphos methyl Pyriproxyfen Simazine Tebuconazole Tetradifon Tolyﬂuanid Triadimenol Triazophos Triﬂoxystrobin Triﬂuralin Vinclozoline 0.04 0.04 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 J Am Oil Chem Soc (2012) 89:389–400 391 Table 1 Recovery of the analyzed pesticides from oil samples spiked with known amount of pesticides (2.5–100 ppb) Fortiﬁcation level (mg kg-1) Recovery RSD Compound (%) (n = 3) (%) (n = 3) Fortiﬁcation level (mg kg-1) Recovery RSD (%) (n = 3) (%) (n = 3) a Averaged for cis and trans-chlordane b Averaged for o,p.-DDT, p,p.-DDT, DDD and DDE c Averaged for o,p.-DMDT and p,p.-DMDT d Averaged for fenvalerate and esfenvalerate e Averaged for a-HCH, b-HCH, g-HCH, d-HCH obtained from POCh (Gliwice, Poland). Silica gel 60 (0.063–200 mm) and Florisil 60 were obtained from Merck (Darmstadt, Germany). Florisil was heated at 500 C for 4 h before use. Silver nitrate impregnated silica gel (10%) was prepared by mixing silica gel with silver nitrate water solution and drying the obtained mixture at 130 C in the dark. Silver nitrate impregnated silica gel was stored in the dark before use. Sulfuric acid impregnated silica gel was 76 94 105 101 105 102 109 14.8 113 96 112 93 105 97 84 94 110 108 64 99 79 97 92 92 103 108 94 106 119 99 95 96 104 98 104 92 108 123 5 3 10 10 9 10 11 27 12 11 12 5 9 15 9 8 10 1 6 9 8 10 11 9 6 11 10 4 6 7 7 12 12 15 4 10 9