Organochlorine Pesticides and PCBs
This method covers the determination of certain organochlorine pesticides and PCBs.
This is a gas chromatographic (GC) method applicable to the determination of the compounds listed above in municipal and industrial discharges as provided under 40 CFR Part 136.1.
A measured volume of sample, approximately 1 L, is extracted with methylene chloride using a separatory funnel. The methylene chloride extract is dried and exchanged to hexane during concentration to a volume of 10 mL or less. The extract is separated by gas chromatography and the parameters are then measured with an electron capture detector. The method provides a Florisil column cleanup procedure and an elemental sulfur removal procedure to aid in the elimination of interferences that may be encountered.
-EPA Method Guidance CD-ROM (includes MCAWW Methods, and most current EPA Methods)
|Hold Time||7 days (sample), 40 days (extract)|
|Preservation||Samples must berefrigerated at 4°C from the time of collection until extraction|
|Sample Volume||1 Liter in glass amber bottle|
|Method Refernce||EPA Method 608|
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