The direct determination of trace arsenic and lead in gasoline by GFAAS
- Thermo Jarrell Ash Corp., Franklin, MA (United States)
Two potential problems in the determination of trace metals in gasoline are the high volatility of the analyte and the difficulty in sample handling. In this work, sample pretreatment with iodine was investigated for its ability to break down volatile organo-metallic complexes prior to the analytical step. Sample handling was also investigated using two distinct approaches; discrete droplet injection and aerosol deposition. The advantage of aerosol deposition for this application is that the sample is first converted to a mist and then dried continuously on a heated graphite surface. This facilitates sample handling as opposed to discrete sample introduction systems which suffer from both vapor pressure and surface tension problems. Furnace parameters were optimized for the two metals individually. From these results, a single method was generated which allowed the investigation of the simultaneous determination of arsenic and lead in gasoline. The AA spectrometer employed a dual galvanometer drive system to control the rapidly alternating selection of both source and wavelength. Using this device, up to four elements at a time can be measured in single furnace atomization. Direct analysis results will be compared to those obtained via the method of standard additions.
- OSTI ID:
- 191755
- Report Number(s):
- CONF-941098-; TRN: 95:006733-0111
- Resource Relation:
- Conference: FACSS XXI: 21st annual conference of the Federation of Analytical Chemistry and Spectroscopy Societies (FACSS), St. Louis, MO (United States), 2-7 Oct 1994; Other Information: PBD: 1994; Related Information: Is Part Of 21st annual conference of the Federation of Analytical Chemistry and Spectroscopy Societies; PB: 257 p.
- Country of Publication:
- United States
- Language:
- English
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