GC Analysis of Water Impurity in C1-C6 Alcohols on Watercol™ 1910

GC Analysis of Water Impurity in C1-C6 Alcohols on Watercol™ 1910

Conditions

column Watercol 1910, 30 m x 0.25 mm I.D., 0.20 µm (29711-U)
oven 40 °C (2 min), 4 °C/min to 125 °C (1 min)
carrier gas helium, 1.1 mL/min
sample 10-component alcohol mix in methylene chloride, 500 µg/mL total concentration (mixture adsorbed some water during storage)
injection 1 µL, 100:1 split
liner 3.4 mm I.D., split/splitless type, wool packed straight FocusLiner™ design (2877601-U)
inj. temp. 300 °C
detector MSD, m/z = 18-500
MSD interface 260 °C

Description

Analysis Note Moisture in raw and finished goods is undesirable in most industries. It may remain from a manufacturing process, or it may be introduced afterwards during storage.

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. Sharp peak shapes are also produced for many other small polar analytes.

This application shows the analysis of water impurity in a C1-C6 alcohols mix. The mixture adsorbed some water during storage. The water peak was confirmed through mass spectral library matching.
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Legal Information Watercol is a trademark of Sigma-Aldrich Co. LLC
suitability application for GC

Materials

     
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