Hi everyone, Im new here. I have a question regarding analyzing a gas mixture with unknown concentration. It might be very simple, but I can't get my head around it.
I am going to analyze an unknown mixture of CO2 and CH4, I would like to determine the concentration of the unknown sample.
I have measured 5 samples (2 parallels each) of a calibration curve:
Sample 1: 50 mL calibration gas
Sample 2: 40 mL calibration gas + 10 mL N2 dilution
Sample 3: 30 mL calibration gas + 20 mL N2 dilution
Sample 4: 20 mL calibration gas + 30 mL N2 dilution
Sample 5: 10 mL calibration gas + 40 mL N2 dilution
The composition of the calibration gas is:
CO2: 2 %
CH4: 2.49 %
O2 (not quantified): 14.98 %
N2: Balance
The measured areas are given below:
Sample Area (average of two parallells)
(Nr) (mV*min)
1 CO2: 56,54415 CH4: 70,6781
2 CO2: 44,2935 CH4: 54,6648
3 CO2: 33,7817 CH4: 41,64015
4 CO2: 21,7364 CH4: 26,984
5 CO2: 11,14795 CH4: 13,86585
The problem I have is how to plot this in a graph. How do I calculate the concentrations of the calibration points, considering their dilutions etc.
Thank you