Interlaboratory evaluation of volatile organic compound determinations in soils prepared by vapor fortification
- Army Cold Regions Research and Engineering Lab., Hanover, NH (United States)
- Univ. of New Hampshire, Durham, NH (United States)
The feasibility of using vapor fortification to prepare secondary soil standards containing volatile organic compounds (VOCs) was evaluated by an interlaboratory study. Twelve laboratories used EPA Method 8240 (SW846) to analyze two independently prepared subsamples of three different soil matrices fortified with trans-1,2-dichloroethylene (TDCE), trichloroethylene (TCE), benzene (Ben), and toluene (Tol). A quality assurance (QA) standard with certified concentrations of TCE, Ben, and Tol (no TDCE) was also analyzed. The pooled relative standard deviation (RSD) for the QA standard was 7.8%, while the same analytes in the soils produced a pooled RSD of 10.4%. Agreement of these precision estimates is excellent, considering that soil analysis required an extraction step while the QA Standard was solvent (methanol) based. TDCE in the soils yielded less precise results (pooled RSD of 20.3%), presumably because of its high volatility.
- OSTI ID:
- 276420
- Report Number(s):
- CONF-950209-; TRN: IM9636%%184
- Resource Relation:
- Conference: 4. international symposium on field screening methods for hazardous wastes and toxic chemicals, Las Vegas, NV (United States), 22-24 Feb 1995; Other Information: PBD: 1995; Related Information: Is Part Of Field screening methods for hazardous wastes and toxic chemicals. VIP-47, Volume 2; PB: 701 p.
- Country of Publication:
- United States
- Language:
- English
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