[Stoves] Free GC equipment - Varian Gas Chromatograph -

[ajheggie at gmail.com]

[Default] On Tue, 17 Jun 2014 09:39:01 -0500,Paul Anderson
<psanders at ilstu.edu> wrote:

>> Your can read up on the unit and how it works.  Basically it sends a 
>> slug of gas into the unit and it travels some 50 foot (maybe 50 yards 
>> depends on column) inside a copper column.  The material in the column 
>> divides and slows down the various components in the gaseous  mix.  
>> And ionizes (burns) the product at exit.  This produces an electrical 
>> signal which is proportional to the volume of the product and the 
>> molecular weight.  As I remember the lighter compounds are first out 
>> the heavier ones are last out.. this gives you a volume (shown in the 
>> Y axis) of each gas (or compound) in the mix and the location on the 
>> graph (on the x axis) determines the compound.  Pretty simple concept.
]
That takes me back 45 years when our high school chemistry class built
one, using tube packed with baked washing powder as the medium.

AJH