This method is for the determination of various organochlorine pesticides from aqueous matrices. The sample is extracted with methylene chloride using a separatory funnel (Method 3510), continuous liquid-liquid extraction (Method 3520), solid-phase extraction (Method 3535), or other appropriate technique. Cleanup of the extract may be needed to remove matrix interferences prior to analysis. Appropriate cleanups include alumina (Method 3610), Florisil (Method 3620), silica gel (Method 3630), gel permeation chromatography (Method 3640), and sulfur (Method 3660). The sample is analyzed by GC/ECD (electron capture detector) and any positive detects are confirmed with use of a second column.
This revision of Method 8081 no longer includes the PCBs (polychlorinated biphenyls) as Aroclors in the list of target analytes. The analysis of PCBs should be undertaken using Method 8082, which includes specific cleanup and quantitation procedures designed for PCB analysis. Please note,
NOTE: Method 8080 has been replaced by Methods 8081B and 8082. This method replaces Methods 8081 and 8081A.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | 7 days from sampling to extraction and 40 days from extraction to analysis |
| Preservatives: | Cool samples to ≤ 6°C. If residual chlorine is present add 3mL of 10% sodium thiosulfate solution per gallon of sample (0.008%). |
| Required Preps: | 1L amber glass bottle |
| Collection Method: | Grab sampling, SW-846 Chapter 2, Table 2-36 |
| Analytical Methodology: | GC/ECD |
| Documentation: | 
8081B
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Heptachlor epoxide | C10H5Cl7O |
1024-57-3 |
0.02 |
µg/L |
| Endosulfan sulfate | C9H6Cl6O4S |
1031-07-8 |
0.04 |
µg/L |
| Hexachlorobenzene | C6Cl6 |
118-74-1 |
0.04 |
µg/L |
| Diallate | C10H17Cl2NOS |
2303-16-4 |
0.04 |
µg/L |
| Aldrin | C12H8Cl6 |
309-00-2 |
0.02 |
µg/L |
| alpha-BHC | C6H6Cl6 |
319-84-6 |
0.02 |
µg/L |
| beta-BHC | C6H6Cl6 |
319-85-7 |
0.02 |
µg/L |
| delta-BHC | C6H6Cl6 |
319-86-8 |
0.02 |
µg/L |
| Endosulfan II | C9H6Cl6O3S |
33213-65-9 |
0.04 |
µg/L |
| Isodrin | 465-73-6 |
0.04 |
µg/L | |
| 4,4'-DDT | C14H9Cl5 |
50-29-3 |
0.04 |
µg/L |
| Chlorobenzilate (Acaraben) | C16H14Cl2O3 |
510-15-6 |
0.04 |
µg/L |
| alpha-Chlordane | C10H6Cl8 |
5103-71-9 |
0.02 |
µg/L |
| gamma-Chlordane | C10H6Cl8 |
5103-74-2 |
0.02 |
µg/L |
| Endrin ketone | 53494-70-5 |
0.04 |
µg/L | |
| Chlordane | C10H6Cl8 |
57-74-9 |
0.25 |
µg/L |
| gamma-BHC (Lindane) | C6H6Cl6 |
58-89-9 |
0.02 |
µg/L |
| Dieldrin | C12H8Cl6O |
60-57-1 |
0.04 |
µg/L |
| Endrin | C12H8Cl6O |
72-20-8 |
0.04 |
µg/L |
| Methoxychlor | C16H15Cl3O2 |
72-43-5 |
0.2 |
µg/L |
| 4,4'-DDD | C14H10Cl4 |
72-54-8 |
0.04 |
µg/L |
| 4,4'-DDE | C14H8Cl4 |
72-55-9 |
0.04 |
µg/L |
| Endrin aldehyde | C12H8Cl6O |
7421-93-4 |
0.04 |
µg/L |
| Heptachlor | C10H5Cl7 |
76-44-8 |
0.02 |
µg/L |
| Hexachlorocyclopentadiene | C5Cl6 |
77-47-4 |
0.04 |
µg/L |
| Toxaphene | C10H10Cl8 |
8001-35-2 |
1 |
µg/L |
| Endosulfan I | C9H6Cl6O3S |
959-98-8 |
0.02 |
µg/L |
| 1,2-Dibromo-3-Chloropropane | C3H5Br2Cl |
96-12-8 |
0.04 |
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.