The procedures described in this application note meet the requirements for sample extraction as determined by U.S. EPA Method 3545. This method is applicable to the extraction of water-insoluble or slightly water-soluble volatile and semivolatile compounds in preparation for gas chromatographic or GC/MS measurement. This method is applicable to soils, clays, wastes, and sediments containing 250–12,500 μg/kg of BNA compounds.
The U.S. EPA Method 8330, first introduced in November 1990, is the most common method for the analysis of explosives. Analytes can be detected down to 2.5 ppb in water, soil, or sediment. Used here are the Thermo Scientific Dionex AutoTrace 280 Solid-Phase Extraction (SPE) instrument and the Thermo Scientific Dionex SolEx SPE HRPHS cartridge to concentrate the explosive residues, followed by HPLC.
Nitrobenzenes are precursors for the production of numerous industrial chemicals and may be released into the environment through wastewater discharge and may contaminate ground and surface waters. This AN demonstrates automated SPE with GC-ECD for the determination of 15 nitrobenzene compounds in drinking water. The automated Thermo Scientific™ Dionex™ AutoTrace 280 SPE instrument was used in conjunction with the Thermo Scientific™ TRACE™ 1310 GC.This work optimizes SPE and GC conditions and the results show high sensitivity for the 15 nitrobenzene compounds specified in HJ 648-2013.
The Thermo Scientific HPLC system is applied for the determination of explosives. The separation is performed on a Thermo Scientific Accucore PFP HPLC column, with UV detection at 254 nm. The separation achieved on the Thermo Scientific Accucore PFP HPLC column is compared to the separation achieved on a Thermo Scientific Accucore C18 HPLC column.
The Thermo Scientific HPLC system is applied for the determination of explosives. The separation is performed on a Thermo Scientific Accucore C18 HPLC column, with UV detection at 254 nm. The separation achieved on the Thermo Scientific Accucore C18 HPLC column is compared to the separation achieved on a Thermo Scientific Accucore PFP HPLC column.
