Paper substrate room-temperature phosphorimetry of polyaromatic hydrocarbons enhanced by surface-active agents
The effect of the presence of surfactants of different character (sodium dodecyl sulfate, sodium decyl sulfate, Brij 35, and dodecyltrimethylammonium chloride) on the paper-substrate room-temperature phosphorescence (PS-RTP) of several polyaromatic hydrocarbons (PAHs) and carbazole was studied. Thallium nitrate was used as a heavy-atom perturber. When an anionic surfactant was added or when analytes were spotted from micellar solutions, enhancements of the sensitivity ranging between factors of 2 and 9 were found. On the other hand, the PS-RTP signal was totally quenched in the presence of the cationic surfactant. Similar effects were found for the phosphorescence of the paper background. Absolute limits of detection in the range of 0.2-3 ng were obtained in the presence of sodium dodecyl sulfate. A discussion on the possible mechanisms producing the observed effects is included.
- Research Organization:
- Univ. of Florida, Gainesville (USA)
- OSTI ID:
- 7149128
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 60:5; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400102* -- Chemical & Spectral Procedures
400201 -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
AMMONIUM COMPOUNDS
AROMATICS
AZAARENES
AZOLES
CARBAZOLES
CHEMICAL ANALYSIS
CHLORIDES
CHLORINE COMPOUNDS
DATA
EMISSION SPECTROSCOPY
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
INFORMATION
LUMINESCENCE
MEDIUM TEMPERATURE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PAPER
PHOSPHORESCENCE
POLYCYCLIC AROMATIC HYDROCARBONS
QUANTITATIVE CHEMICAL ANALYSIS
SODIUM COMPOUNDS
SPECTROSCOPY
SULFATES
SULFUR COMPOUNDS
SURFACTANTS