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GC Analysis of Water in Gasoline (Spiked) on Watercol™ 1460

GC Analysis of Water in Gasoline (Spiked) on Watercol™ 1460

Conditions

column Watercol 1460, 30 m x 0.25 mm I.D., 0.20 µm; two identical columns installed in the same inlet, each going to a separate detector (29695-U)
oven 45 C (4 min), 5 C/min to 75 C, 10 C/min to 220 C (10 min)
carrier gas helium, 20 cm/sec (measured in each column at an oven temperature of 135 C)
sample unleaded gasoline, spiked with water at 0.25% (v/v)
injection 1 µL, 50:1 split
liner 4 mm I.D., split/splitless type, wool packed single taper FocusLiner(TM) design
inj. temp. 250 C
detector FID, 250 C; TCD, 200 C

Description

Analysis Note Residual moisture in fuel is very undesirable. This is because it reduces the heat of combustion which increases engine stress, corrodes fuel system components, allows gelling of fuel in cold temperatures through ice crystal formation and nucleation, and accelerates the growth of microbial colonies which can clog fuel systems.

The "Watercol" series of ionic liquid capillary GC columns are characterized by their ability to produce a sharp peak shape for water, sharp enough so that water can be integrated and quantified. This application shows the suitability of Watercol 1460 for the analysis of water in gasoline. The water peak was confirmed by injecting a series of standards (water in ethanol). In addition to a sharp water peak, the column′s selectivity results in elution of the water peak free from most gasoline components.
Featured Industry Petroleum
Legal Information Watercol is a trademark of Sigma-Aldrich Co. LLC
suitability application for GC

Materials

     
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