Effect of sample geometry on synchronous fluorimetric analysis of petrol, diesel, kerosene and their mixtures at higher concentration

Citation
D. Patra et Ak. Mishra, Effect of sample geometry on synchronous fluorimetric analysis of petrol, diesel, kerosene and their mixtures at higher concentration, ANALYST, 125(8), 2000, pp. 1383-1386
Citations number
24
Categorie Soggetti
Chemistry & Analysis","Spectroscopy /Instrumentation/Analytical Sciences
Journal title
ANALYST
ISSN journal
00032654 → ACNP
Volume
125
Issue
8
Year of publication
2000
Pages
1383 - 1386
Database
ISI
SICI code
0003-2654(2000)125:8<1383:EOSGOS>2.0.ZU;2-5
Abstract
A comparison of synchronous fluorescence scan (SFS) spectra of petrol, dies el and their mixtures with kerosene in front surface, 45 degrees and 90 deg rees angle sample geometry as obtainable from a commercial fluorimeter reve als that 90 degrees angle sample geometry provides certain distinct charact eristics to SFS spectra. The presence of extensive inner filter effects and resonance energy transfer in petroleum products are the major causes of th e distinctive characteristics of these spectra. These characteristics enabl e the development of calibration plots for mixture samples (petrol-kerosene and diesel-kerosene) based on the shift in lambda(SFS)(max) and SFS intens ity. This novel method shows promise in detecting and estimating the contam ination of petrol and diesel by kerosene. Calibration graphs obtained from SFS intensity measurement are found to be efficacious in the whole range 0- 90% v/v of kerosene, and give a good linearity in the adulteration range ge nerally found in the field (0-50% v/v) for petrol and diesel. The method is simple, rapid and superior both in terms of sensitivity (0.1% v/v) and acc uracy to other analytical methods used for petroleum product analysis.