GC Analysis of Water in Ibuprofen (Unspiked) on Watercol 1910

GC Analysis of Water in Ibuprofen (Unspiked) on Watercol™ 1910 suitable for GC


analytical column

Product No.

Watercol 1910 Capillary GC Column

L × I.D. 30 m × 0.25 mm, df 0.20 μm



Watercol 1910, 30 m x 0.25 mm I.D., 0.20 μm (29711-U)


35 °C (4 min), 8 °C/min to 130 °C (1 min)

inj. temp.

250 °C


TCD, 200 °

carrier gas

helium, 11.40 psi constant pressure (equal to 25 cm/sec), measured with oven at 35 °C


1 μL, 100:1 split


4 mm I.D., split/splitless type, wool packed single taper FocusLiner design (2879925-U)


0.198 g ibuprofen weighed into a 1 mL volumetric flask, 0.5 mL acetone added, vortexed slowly for 30 seconds, acetone added to the 1 mL line, vortexed, transferred to an autosampler vial


Analysis Note

Residual moisture in an active pharmaceutical ingredient (API) is undesirable. This is because it dilutes the amount of the API. It may also interfere with the performance of the API.

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 1910 for the analysis of water in ibuprofen. The water peak was confirmed by injecting a series of standards (water in acetone).

Legal Information

FocusLiner is a trademark of SGE Analytical Science Pty Ltd.
Watercol is a trademark of Sigma-Aldrich Co. LLC