## 2 Materials and Methods
### Chemicals
\begin{table}
\begin{tabular}{c c c c c c} \hline
**Pesticide** & **Class** & **CAS Number** & **Molecular Weight** & **Solubilization Solvent** & **Precursor Ions** & **Diagnostic Ions** \\ \hline Aldrin & organochlorine & 309-00-2 & 364.9 & Toluene & 262.9 & 190.9; 192.9 \\ Azimbos-ethyl & organophosphorus & 2642-71.9 & 345.4 & Acetonitrile & 132.0 & 51.0; 77.0 \\ cis-Chlordane & organochlorine & 5103-71-9 & 409.8 & Toluene & 271.7; 372.8 & 236.8; 265.9 \\ trans-Chlordane & organochlorine & 5103-74-2 & 409.8 & Toluene & 271.7; 372.8 & 236.8; 265.9 \\ Chlorfenvinphos & organophosphorus & 470-90-6 & 359.6 & Acetonitrile & 266.9 & 159.0; 203.0 \\ Chlorpyrifos & organophosphorus & 2921-88-2 & 350.6 & Acetonitrile & 314.0 & 258.0 \\ Chlorpyrifos- & organophosphorus & 5598-13-0 & 322.5 & Acetonitrile & 125.0; 286.0 & 79.0; 93.0 \\ methyl & pyrethhold & 1820573-27-0 & 434.3 & Toluene & 206.0 & 151.0; 177.0; 179.0 \\ Cymethrin & pyrethhold & 52315-07-8 & 416.3 & Toluene & 181.0 & 127.0; 152.0 \\ p,p’ DDD & organochlorine & 72-54.8 & 320.0 & Toluene & 235.0; 237.0 & 165.0 \\ p,p’ DDE & organochlorine & 72-55-9 & 318.0 & Toluene & 246.0; 318.0 & 176.0; 248.0 \\ p,p’ DDT & organochlorine & 50-29-3 & 354.5 & Toluene & 235.0; 237.0 & 165.0 \\ Deltamethrin & pyrethhold & 52918-63-5 & 505.2 & Acetonitrile & 181.1; 152.58 & 152.0; 92.9 \\ Diazin & organophosphorus & 333-41-5 & 304.3 & Acetonitrile & 137.1 & 54.1; 84.1 \\ Dieldrin & organochlorine & 60-57-1 & 380.9 & Toluene & 262.8; 277.0 & 227.8; 241.0 \\ \(\alpha\)-Endosulfan & organochlorine & 959-98-8 & 406.9 & Toluene & 195.0; 240.0 & 160.0; 206.0 \\ \(\beta\)-Endosulfan & organochlorine & 33213-65-9 & 406.9 & Toluene & 195.0; 240.9 & 160.0; 206.0 \\ Endosulfan & organochlorine & 1031-07-8 & 422.9 & Toluene & 238.7; 271.8 & 203.9; 234.9 \\ Endrin & organochlorine & 72-20-8 & 380.9 & Toluene & 245.0; 262.9 & 173.0; 193.0 \\ Fenthion & organophosphorus & 55-38-9 & 278.3 & Acetonitrile & 245.3; 278.0 & 125.0; 109.0; 169.0 \\ Fenvalerate & pyrethhold & 51630-58-1 & 419.9 & Acetonitrile & 125.0; 167.0 & 83.3; 125.0 \\ \(\alpha\)-HCH & organochlorine & 319-84-6 & 290.8 & Toluene & 181.0; 219.0 & 145.0; 183.0 \\ \(\beta\)-HCH & organochlorine & 319-85-7 & 290.8 & Toluene & 181.0; 219.0 & 145.0; 183.0 \\ \(\gamma\)-HCH & organochlorine & 58-89-9 & 290.8 & Toluene & 180.9; 218.9 & 144.0; 182.9 \\ Heptachlor & organochlorine & 76-44-8 & 373.3 & Toluene & 99.8; 272.0 & 65.0; 237.0 \\ exo-epoxide & organochlorine & 1024-57-3 & 389.3 & Toluene & 262.9; 352.8 & 192.9; 262.9 \\ Heptachlor & organochlorine & 28044-83-9 & 389.3 & Toluene & 183.0 & 119.0; 155.0 \\ Malathion & organophosphorus & 121-75-5 & 330.4 & Acetonitrile & 158.0; 173.1 & 125.0; 99.0 \\ Parathion-ethyl & organophosphorus & 56-38-2 & 291.3 & Acetonitrile & 109.0; 291.0 & 81.0; 109.0 \\ Permethrin & pyrethhold & 52645-53-1 & 391.3 & Toluene & 183.0 & 128.0; 152.0; 168.0 \\ Phenorthrin & pyrethhold & 26002-80-2 & 350.4 & Acetonitrile & 183.0 & 115.0; 128.0 \\ Profenofos & organophosphorus & 41198-08-7 & 373.6 & Acetonitrile & 296.7; 336.9 & 268.9; 266.9 \\ Pyrazophos & organophosphorus & 13457-18-6 & 373.4 & Acetonitrile & 221.0 & 148.7; 193.1 \\ Pirimiphos-methyl & organophosphorus & 29232-93-7 & 305.3 & Acetonitrile & 290.1 & 125.0; 233.0 \\ Quintozene & organochlorine & 82-68-8 & 295.3 & Toluene & 213.8 & 141.9; 178.9 \\ Tecnazene & organochlorine & 117-18-0 & 260.9 & Toluene & 214.8 & 143.6; 178.7 \\ Triazophos & organophosphorus & 24017-47-8 & 313.3 & Acetonitrile & 161.0 & 105.7; 134.1 \\ \hline \end{tabular}
\end{table} 
Table 1: List of pesticides analyzed by GC-MS/MS.