Chromatography Forum

Hi all
We have FPD(GOW-MAC) with Chromsil Columns(8'*1/8' O.D. Teflon central 6"packed) , Our STDgas contain H2S,DMS,CSO,(carbon oxysulfide),when we run stadgas and found these component cant seperated completely , and furthermore the area of peak is very small , Parameter setting as follow:Columns temperature:50D,sample 200ml/min,Air 80ml/min, H2(1) 13ml/min;H2(2) 54 ml/min, sample loop 1 ml , we have try to change temperature and flowrate, but it doesnt work , i dont know the chromsil columns exactly its property , who have some experience about the the columns and how we should do deal with the issues.

Thanks in advance

Hi one could check the testchromatogram provided hopefully with the column. You could run this sample to check whether the column is still performing as the supplier stated.
Contact the supplier for details of this colum: resolution and selectivity

Thanks
at start ,the columns is okay, due to a long time wasnt used , but carrier gas still on , recently we try to run sample ,found some peak can be separate ,and some cant be separate completely , furthermore all the peaks come out in a shorten time ,i have no idea about this columns ,sb can tell me this columns special property and maybe we should condition the columns again, i dont know whether have some kind of issues with FPD.or some leakage wasnt easy to found, some expert give me some suggestion and right way to resolve it .

best regards