Evaluation of Polarity of Two Serially Connected Capillary Columns by Using the Free Energy of Transfer from Solution to Gas of n-Alkanes

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Karuna Katsuwan
King Mongkut's University of Technology Thonburi, Bangkhuntien, Bangkok 10150
Kittipong Tunphun
King Mongkut's University of Technology Thonburi, Bangkhuntien, Bangkok 10150
Kornkanok Aryusuk
King Mongkut's University of Technology Thonburi, Bangkhuntien, Bangkok 10150
Kanit Krisnangkura
King Mongkut's University of Technology Thonburi, Bangkhuntien, Bangkok 10150

Abstract

Gas chromatographic column polarity is an important factor for selecting the right column forsuccessful separation of a complex mixture. Column polarity can be expressed by different measurablevalues. In this study, the free energy of transfer from solution to gas of n-alkanes is proposed. The relationship between column polarity and the free energy of transfer from solution to gas is verified by using two serially connected columns ofdifferent polarities and different column length ratios. The free energy of transfer from solution to gasvalues of n-alkanes increase negativelyas the length of the polar column is increased.

Keywords : Polarity of Capillary Column / Two Serially Connected Capillary Columns / Free Energyof Transfer from Solution to Gas / n-Alkanes

Article Details

Issue
Vol. 31 No. 4 (2008): October - December
Section
Original Articles
Author Biographies

Karuna Katsuwan, King Mongkut's University of Technology Thonburi, Bangkhuntien, Bangkok 10150

Graduated Student, Biochemical Technology Program, School of Bioresources and Technology.

Kittipong Tunphun, King Mongkut's University of Technology Thonburi, Bangkhuntien, Bangkok 10150

Graduated Student, Biochemical Technology Program, School of Bioresources and Technology.

Kornkanok Aryusuk, King Mongkut's University of Technology Thonburi, Bangkhuntien, Bangkok 10150

Lecturer, Biochemical Technology Program, School of Bioresources and Technology.

Kanit Krisnangkura, King Mongkut's University of Technology Thonburi, Bangkhuntien, Bangkok 10150

Associate Professor, Biochemical Technology Program, School of Bioresources and Technology.