Saturday, March 24, 2012

Rapid Analysis of High Molecular Weight (C18 to C30) Hydrocarbons, #GC,#Fast_GC,,#C18_to_C30_ alkanes

Much of the previous work on “fast GC” utilized short (5M) thin film capillary columns to elute solutes quickly and the result is rapid but inferior separations because of the short column. New technology developed at Valco’s capillary column development center where VICI takes polyimide-coated fused silica (FST) and removes the polyimide layer. Then the (FST) is electroplated with nickel. As a result of the superior heat transfer of the electroplated nickel, we are able to rapidly and efficiently heat and achieve excellent resolution for a 30M capillary column.
 These columns can be programmed faster (hundreds of degrees/min)- save 50-90%
 The columns can be reliable started a few degrees above ambient
 These columns cool down faster because of their low mass, so savings are> 50%
Several examples of C1 to C6 HC that are given below demonstrate a > 50% reduction in analysis times:The columns can be programmed faster 50-60o/min and will cool down faster as a result of their low mass.
A schematic of the fast GC electronics is shown below:

An example of a fast separation of C18- C30 by fast GC is shown below at rates from 80 to 800 C/min is shown below. Note that even for lower program rate, the time for analysis is only 4 min.

Contact PID Analyzers for more info on “The FAST GC”
PID Analyzers, LLC 2 Washington Circle, Sandwich, MA 02563; T 1 774 413 5281

1 comment:

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