Gasolines analysis

Examples of nir analysis are polymer identification (126,127), pharmaceutical manufacturing (128), gasoline analysis (129,130), and on-line refinery process chemistry (131). Nir fiber optics have been used as immersion probes for monitoring pollutants in drainage waters by attenuated total internal reflectance (132). The usefulness of nir for aqueous systems has led to important biological and medical appHcations (133). 

J.C. Edwards, P.J. Giammatteo, G.P. Eirmstone, and P.D. Cusatis, Development of a process NMR gasoline analysis system. Presented at 37th Experimental NMR Conference, Pacific Grove, 1996. 

R. Meusinger, Gasoline analysis by H nuclear magnetic resonance spectroscopy. Fuel, 75(10), 1235-1243 (1996). 

We would like to thank M. Wallace, S. Roush and J. Mangano for preparing samples, C. Petr, A. Wadsworth and G. Lundquist for help with the gasoline analysis, and M. Shatlock for the MASNMR spectra. 

The laboratory will store the containers with methanol-preserved soil at 2-6°C. The holding time for analysis is 14 days as defined by EPA Method 5035. ASTM Standard D 4547-98 indicates that methanol-preserved samples do not exhibit VOC losses for a period of time of up to two months (ASTM, 1998). The state of Alaska Department of Environmental Conservation (ADEC) Method AK101 for gasoline analysis of methanol-preserved soil samples specifies a holding time of 28 days (ADEC, 1999). 

Product Evaluation. Gaseous products were analyzed by gas chromatography (GC) using an alumina column. Liquid products were evaluated by physical properties, elemental analysis, liquid chromatographic separation (9), and simulated distillation (10). Distillation to produce a gasoline fraction was accomplished with a spinning band distillation column. Gasoline analysis and evaluation was obtained from an industrial analysis laboratory. 

KEYWORDS sulfur analysis, gasoline analysis, diesel analysis, interlaboratory crosscheck programs, ultralow sulfur in diesels... 

Figure 1 GCxGC data from a gasoline analysis visualized as a digital image. Only a portion of the data is shown. (This and other figures were generated with GC Image software [1]. Data supplied by Zoex Corporation.)...

Figure 10 A template from a gasoline analysis is overlaid and matched to peaks in a diesel sample, thereby identifying the peaks and groups of interest. A subregion of the data is shown with open circles, showing the expected peak positions in the template.

Meusinger, R., Gasoline Analysis by H Nuclear Magnetic Resonance Spectroscopy, Fuel, Vol. 75, 1996, pp. 1235-1243. 

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