Determination of aromatic compounds in water by solid phase microextraction and ultraviolet absorption spectroscopy. 2. Application to fuel aromatics
- Univ. of North Dakota, Grand Forks, ND (United States)
Solid phase microextraction is coupled with ultraviolet absorption spectroscopy to determine fuel aromatic hydrocarbons from unleaded gasoline, jet fuel (JP4), and no. 1 diesel fuel in water. A rectangular `chip` of poly(dimethylsiloxane) (OV-1) was used as the sorbent medium to selectively partition the various fuels from real water matrices without interferences from naturally occurring organics (e.g., humic and fulvic acids). Equilibration times are under 45 min for the majority of aromatic compounds and range from 150 to 300 min for the three fuels. However, it is shown that the fuels can be quantitated at significantly shorter extraction times (45 min), resulting in only a loss of nearly 2x in the detection limits. Detection limits for unleaded gasoline, JP4, and no. 1 diesel fuel (obtained at their 100% equilibration times) are 4.9, 17, and 9.0 ppb, respectively. In addition, recovery data for the aromatic components from unleaded gasoline, JP4, and no. 1 diesel fuel from two real water matrices are in the range of 87-106%, with RSDs in the range of 5.0-10%. 4 refs., 2 figs., 6 tabs.
- OSTI ID:
- 466363
- Journal Information:
- Analytical Chemistry (Washington), Journal Name: Analytical Chemistry (Washington) Journal Issue: 6 Vol. 69; ISSN 0003-2700; ISSN ANCHAM
- Country of Publication:
- United States
- Language:
- English
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