Determination of Aromatic Arsines in Environmental Solids by Direct Thermal Desorption Gas Chromatography

摘要: ABSTRACTTo quantify aromatic arsines in the environment, such as World War I era chemical warfare agents and degradation products of arsenicals used agriculture, a sensitive, selective, direct method is needed. We describe development optimization for measurement trace levels triphenylarsine model arsenic compound. Triphenylarsine was determined at low µg/g sand, soil, lake sediment by thermal desorption before gas–liquid chromatography (GC) with mass spectrometric pulsed flame photometric detection. The dithiol derivative phenylarsonic acid an internal standard, thereby significantly improving precision method. conditions were studied found to be optimal 350°C 15 min. Significant improvement realized preparing solid samples slurries acetone inserting small (∼100 mg) quartz wool plug into sample vial. applied determine tr...