M/s. Gulf Analytical Supplies FZE have an established presence of nearly a decade in the middle east market and have a dominant presence in the field of separation science comprising mainly of chromatography with more than thousand columns supplied in the Middle East.  With the help of application support and technical support from our principals, we are the pioneers in the field of column chromatography.

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Products / SGE Analytical Science / GC Capillary columns

GC Capillary columns
3. Film Thickness
• For samples with a variation in solute concentration, a thicker film column is recommended. This will   reduce the possibility of broad overloaded peaks coeluting with other compounds of interest. If the   separation of two solutes is sufficient and co-elution is still unlikely, even with large differences in   concentration, then a thinner film can be used.
• The greater the film thickness the greater the retention of solutes, therefore the higher the elution   temperature. As a rule, doubling the film thickness results in an increase in elution temperature of   approximately 15-20 C under isothermal conditions. Using a temperature program, the increase in   elution temperature is slightly less.
• From the phase ratio value , a column can be categorized for the type of application it would best   suit. The smaller the value, the greater the ratio of phase to the column inner diameter, making it   better suited for analyzing volatile compounds.Columns that have thin films are generally better suited   for high molecular weight compounds and are characterized by large values.
• Maintain phase ratio among different ID columns to yield similar chromatography.
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