This method is for the determination of organohalide pesticides and polychlorinated biphenyls (PCB's) in finished drinking water, drinking water during intermediate stages of treatment, and raw source water. Thirty-five milliliters of sample are extracted with 2mL of hexane and analyzed by GC/ECD (electron capture detector). Any positive detects are confirmed by analyzing with a second column.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | 14 days from collection to extraction. If heptachlor is to be analyzed then the holding time is 7 days from collection to extraction. |
| Preservatives: | Samples must be iced or refrigerated at 4°C from the time of collection until extraction. Add 3mg of sodium thiosulfate or 75uL of sodium thiosulfate (0.04 g/mL) to empty bottles prior to collection. |
| Required Preps: | 40mL glass bottle with Teflon-lined lid |
| Collection Method: | Grab sampling |
| Analytical Methodology: | GC/ECD |
| Documentation: | 
505
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Heptachlor epoxide | C10H5Cl7O |
1024-57-3 |
0.004 |
µg/L |
| Aroclor-1260 | 11096-82-5 |
0.189 |
µg/L | |
| Aroclor-1254 | 11097-69-1 |
0.102 |
µg/L | |
| Aroclor-1221 | 11104-28-2 |
15 |
µg/L | |
| Aroclor-1232 | 11141-16-5 |
0.48 |
µg/L | |
| Hexachlorobenzene | C6Cl6 |
118-74-1 |
0.002 |
µg/L |
| Simazine | C7H12ClN5 |
122-34-9 |
6.8 |
µg/L |
| Aroclor-1248 | 12672-29-6 |
0.102 |
µg/L | |
| Aroclor-1016 | 12674-11-2 |
0.08 |
µg/L | |
| Alachlor (Lasso) | C14H20ClNO2 |
15972-60-8 |
0.225 |
µg/L |
| Atrazine | C8H14ClN5 |
1912-24-9 |
2.4 |
µg/L |
| Aldrin | C12H8Cl6 |
309-00-2 |
0.007 |
µg/L |
| trans-Nonachlor | C10H5Cl9 |
39765-80-5 |
0.011 |
µg/L |
| alpha-Chlordane | C10H6Cl8 |
5103-71-9 |
0.006 |
µg/L |
| cis-Nonachlor | C10H5Cl9 |
5103-73-1 |
0.027 |
µg/L |
| gamma-Chlordane | C10H6Cl8 |
5103-74-2 |
0.012 |
µg/L |
| Aroclor-1242 | 53469-21-9 |
0.31 |
µg/L | |
| Chlordane | C10H6Cl8 |
57-74-9 |
0.14 |
µg/L |
| gamma-BHC (Lindane) | C6H6Cl6 |
58-89-9 |
0.003 |
µg/L |
| Dieldrin | C12H8Cl6O |
60-57-1 |
0.012 |
µg/L |
| Endrin | C12H8Cl6O |
72-20-8 |
0.063 |
µg/L |
| Methoxychlor | C16H15Cl3O2 |
72-43-5 |
0.96 |
µg/L |
| Heptachlor | C10H5Cl7 |
76-44-8 |
0.003 |
µg/L |
| Hexachlorocyclopentadiene | C5Cl6 |
77-47-4 |
0.13 |
µg/L |
| Toxaphene | C10H10Cl8 |
8001-35-2 |
1 |
µg/L |
* The analytes and detection limits listed for each method represent the typical detection limits and analytes reported for that particular method. Keep in mind that analyte lists may vary from laboratory to laboratory. Detection limits may also vary from lab to lab and are dependent upon the sample size, matrix, and any interferences that may be present in the sample.