Validation of a New Soil VOC Sampler: Precision of the Performance of the En Core Sampler to Store Low VOC Concentrations
Soil sampling and storage practices for volatile organic analysis must be designed to minimize loss of volatile organic compounds (VOCs) from samples. The En Core{reg_sign} sampler is designed to collect and store soil samples in a manner that minimizes loss of contaminants due to volatilization and/or biodegradation. An American Society for Testing and Materials (ASTM) standard practice, D 6418, Standard Practice for Using the Disposable En Core Sampler for Sampling and Storing Soil for Volatile Organic Analysis, describes use of the En Core sampler to collect and store a soil sample of approximately 5 grams or 25 grams for volatile organic analysis. To support the ASTM practice, four studies have been performed to evaluate the performance of the En Core sampler for storage of soil samples spiked with VOCs. The first study was conducted to evaluate the performance of the device to store soil samples spiked with VOCs at high-level concentrations of approximately 2,500 {micro}g/Kg under various conditions. This analyte concentration in the soil was selected to limit the influence of the analytical method on the data. A second study was conducted to answer questions on the performance of the En Core sampler for storage of soil samples containing low-level (<200 {micro}g/Kg) concentrations of VOCs. In this study, soil samples were spiked with concentrations of VOCs at approximately 100 {micro}g/Kg and stored under various conditions prior to analysis. The third study was performed to generate data on the performance of the 25-gram En Core sampler to store soil samples spiked with EPA Method 1311, Toxicity Characteristic Leaching Procedure (TCLP), volatile organic analytes under various conditions for 14 days. The low-level performance data and TCLP analyte storage data are included in appendices to the ASTM practice, and the ASTM research report describing the high-level study is referenced in the practice. The fourth study, which is described in this report, was performed to estimate the precision of the performance of the 5-gram and 25-gram En Core samplers to store soil samples spiked with low concentrations of VOCs. This was done so that information on the precision of the performance of the devices can be added to the ASTM practice. Data generated in the precision validation study show very good precision of the performance of the En Core samplers to store soil samples spiked with low concentrations of a variety of VOCs.
- Research Organization:
- Western Research Institute
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC26-98FT40323
- OSTI ID:
- 910126
- Country of Publication:
- United States
- Language:
- English
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