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  1. JWF239

    Determining how much gas to purchase

    I am ordering some calibration gases to develop a method for my gas cell equipped FTIR. The gas cell is roughly 2 liters in volume and I vacuum it down to -28 in Hg. I want to run the samples at 20 psig. I have another cylinder from the company I am going to order from that says it is 34 L when...
  2. JWF239

    Determination of gas volume coming from an orifice

    I had found some formula online and solved for the 2.5985 but I did not write down what the entire formula was and now cannot find it. I used the things I said I have and maybe an assumption or two to get what I have. I was hoping the formula would be familiar to someone. What else would I...
  3. JWF239

    Determination of gas volume coming from an orifice

    So I am trying to determine the volume of a gas that has been put through a filter so I can do some calculations. I randomly have the formula Density (lb/Ft3)* Volume (Ft3/min) = 2.5985 But I am not sure where I got this from. The only things I know are what type of gas it is, the PSI that gas...
  4. JWF239

    Need help calculating PPM (% Mol) in Gas samples

    Hello all, I am using an FTIR to attempt to calculate concentrations of impurities in air and oxygen. I have a standard that I know has 500.5 ppm (% mol) of CO2 and am trying to use the spectrum that I obtained from this sample to back calculate and find this value. Does anyone have any...
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