Page 1 of 1

FID calibration data

Posted: Fri Jan 25, 2013 4:34 pm
by bh.buaa
We just calibrated a Agilent GC6890 with C2H2, C2H4 and C2H6 mixture, the concentration for these three components are 0.5%. The column is capillary GS-Carbon PLOT (30m X 0.32mm X 3.00 um), the detector is FID. We would like to know if our calibration data is good enough for future measurement? How much should the errors of the data be? Thanks a lot.
Below is the calibration data:

# Component 1 2 3 4 5 Average st deviation
1 C2H2 839.7 834.4 854.4 858.4 867.4 850.86 12.15262935
2 C2H4 955.3 947.9 975.5 975.9 989.0 968.72 14.98244306
3 C2H6 974.2 964.5 997.4 991.2 1004 986.26 14.71157368

Re: FID calibration data

Posted: Sun Jan 27, 2013 11:16 pm
by Robert Van Hale
I suggest calculating an RSD (relative standard deviation) = 100*S.D./Average.
Eg for component 1 you've got 100*12/850=1.4 %.
Good enough for purpose?