By Christian Demandt on Tuesday, November 16, 1999 - 12:56 am:
I am looking for a column to seperate C , N and S
Just now we are working with a Porapak QS 4x6 mm and 2 meters long, but we dont get a good seperation between the C and N peak and the S peak is very small.
Maybe someone knows a better column to use or know were we can buy a new Porapak in Scandinavia or somwhere in Europe.
Thanks
By John Hinshaw on Friday, November 19, 1999 - 02:38 pm:
Dear Christian,
I cannot answer your question without knowing the exact chemical substances you wish to separate. You are using a Porapak column now, so I will assume you are separating low molecular weight gases.
Please reply with another message in this forum with the correct chemical names or formulas.
John Hinshaw
By Bill Jenko on Wednesday, November 24, 1999 - 07:46 pm:
HP used to make a nifty C-H-N analyzer that burned the sample in air to produce CO2, H2O and NOx, then reduced the NOx to N2, and measured all 3 on a Porapak GC column and a small TCD. Are you doing something like this for C-N-S?
By Stefan on Friday, December 3, 1999 - 09:26 am:
I agree with Bill,i use the elementary analyser EA 1110 CHNS-O of Thermo Quest (Carlo Erba) and i think that is the best solution for separate your component with porapak Gc column and TCD.
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