Improvements in preparation of samples generated by SW-846 Method 0010
- Environmental Protection Agency, Research Triangle Park, NC (United States)
- Radian Corp., Research Triangle Park, NC (United States)
A field evaluation study for SW-846 Method 0010 was conducted at a stationary source emission site with a high moisture content. The recovery of the dynamically spiked analytes and the spikes added before the laboratory preparation of the XAD-2{reg_sign} resin were low. The sampling train media had been prepared according to Method 0010 protocol, so the laboratory procedures were examined in detail for sources of error. The XAD-2{reg_sign}, wet because of the source matrix, was difficult to fully remove from the glass trap using only methylene chloride. Because Method 0010 does not specify the solvent to use for trap rinsing, and since the probe was washed in the field with a 50:50 mixture of methylene chloride and methanol, this mixture was used to transfer the XAD-2{reg_sign} from the trap to the Soxhlet extractor. The low recoveries were attributed to the presence of the methanol in the final extract. (The methanol is removed from the probe rinses during the laboratory sample preparation process.) A proposed method will be presented that permits the physical removal of wet XAD-2{reg_sign} from the sampling trap without the use of methanol and an alternate procedure is provided for removal of methanol from the trap rinse before sample extract concentration.
- OSTI ID:
- 197374
- Report Number(s):
- CONF-9405167-; TRN: IM9612%%148
- Resource Relation:
- Conference: Measurement of toxic and related air pollutants, Durham, NC (United States), 3-6 May 1994; Other Information: PBD: 1994; Related Information: Is Part Of Measurement of toxic and related air pollutants. Proceedings of the 1994 U.S. EPA/A and WMA international symposium; PB: 1075 p.
- Country of Publication:
- United States
- Language:
- English
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