This method is used for sampling and analysis of a variety of common pesticides and for polychlorinated biphenyls (PCBs) in ambient air. The procedure is based on the adsorption of chemicals from ambient air on polyurethane foam (PUF) or a combination of PUF and granular sorbent using a low volume sampler. The low volume PUF sampling procedure is applicable to multicomponent atmospheres containing common pesticide concentrations from 0.001 to 50 µg/m³ over 4 to 24 hour sampling periods. The limits of detection will depend on the nature of the analyte and the length of the sampling period. Method TO-4A is similar, but is used for higher rates of volume on collection.
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| Hold Times, Preservatives, Preps, Collection, Analytical & Documentation | |
|---|---|
| Holding Time: | 7 days from collection to extraction |
| Preservatives: | Refrigerate at 4 °C and protect from light |
| Required Preps: | A 32 mm quartz microfiber filter (baked) and a precleaned 22 mm x 7.6 cm PUF (soxhlet extracted) are required; A glass sorbent cartridge to hold PUF; Prep hold time is 30 days. Wrap cartridge in foil and place in jar with TFE-fluorocarbon lined cap |
| Collection Method: | TO-10A |
| Analytical Methodology: | GC/ECD, NPD, FPD, HECD, HPLC/UV by TO-10A |
| Documentation: | 
TO-10A
|
| Analyte | Formula | CAS Number | Detection Limit | |
|---|---|---|---|---|
| Aroclor-1260 | 11096-82-5 |
0.1 |
µg | |
| Aroclor-1254 | 11097-69-1 |
0.1 |
µg | |
| Dicofol (Kelthane) | 115-32-2 |
0.1 |
µg | |
| Captan | C9H8Cl3NO2S |
133-06-2 |
0.1 |
µg |
| Folpet | C9H4Cl3NO2S |
133-07-3 |
0.1 |
µg |
| Polychlorinated Biphenyls | 1336-36-3 |
0.1 |
µg | |
| Dicrotophos | C8H16NO5P |
141-66-2 |
0.1 |
µg |
| Carbofuran | C12H15NO3 |
1563-66-2 |
0.1 |
µg |
| Alachlor (Lasso) | C14H20ClNO2 |
15972-60-8 |
0.1 |
µg |
| Chlorothalonil (Bravo) | C8Cl4N2 |
1897-45-6 |
0.1 |
µg |
| Atrazine | C8H14ClN5 |
1912-24-9 |
0.1 |
µg |
| Fluometuron | C10H11F3N2O |
2164-17-2 |
0.1 |
µg |
| Bendiocarb | C11H13NO4 |
22781-23-3 |
0.1 |
µg |
| Aldrin | C12H8Cl6 |
309-00-2 |
0.1 |
µg |
| Diuron | C9H10Cl2N2O |
330-54-1 |
0.1 |
µg |
| Diazinon | C12H21N2O3PS |
333-41-5 |
0.1 |
µg |
| 4,4'-DDT | C14H9Cl5 |
50-29-3 |
0.1 |
µg |
| Aroclor-1242 | 53469-21-9 |
0.1 |
µg | |
| Ethyl parathion | C10H14NO5PS |
56-38-2 |
0.1 |
µg |
| Chlordane | C10H6Cl8 |
57-74-9 |
0.1 |
µg |
| Allethrin | C19H26O3 |
584-79-2 |
0.1 |
µg |
| gamma-BHC (Lindane) | C6H6Cl6 |
58-89-9 |
0.1 |
µg |
| Dieldrin | C12H8Cl6O |
60-57-1 |
0.1 |
µg |
| Dichlorvos | C4H7Cl2O4P |
62-73-7 |
0.1 |
µg |
| Carbaryl (Sevin) | C12H11NO2 |
63-25-2 |
0.1 |
µg |
| 4,4'-DDE | C14H8Cl4 |
72-55-9 |
0.1 |
µg |
| 2,4-D | C8H6Cl2O3 |
94-75-7 |
0.1 |
µg |
* 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.