Use the following data and the gas chromatogram from a 20m x 0.30mm x 0.50μm capillary column to answer the following questions: a) What is the resolution between peaks 1 and 2? b) Calculate the retention factor range for this separation. c) What is the selectivity between compounds 1 and 2? d) Determine the number of theoretical plates for compound 1. e) What is the HETP (in mm/plate)? (Hint: use only compound 1 for this calculation). f) What is the linear gas velocity (in cm/sec)? g) Calculate β, given β = rc /2df where rc is the radius of the column h) Calculate retention volume of the mobile phase, Vm. (hint: Convert velocity to flow using the cross sectional area of the column, πr2 ) i) Calculate the volume of the stationary phase, Vs. j) Calculate the Trennzahl number. Data: tm = 1.00 min (unretained peak) t1 = 3.52 min t2 = 8.15 min Wb1= 0.45 min Wb2= 0.75 min Wh1 = 0.22 min Wh2 = 0.25 min
Use the following data and the gas chromatogram from a 20m x 0.30mm x 0.50μm capillary column to answer the following questions: a) What is the resolution between peaks 1 and 2? b) Calculate the retention factor range for this separation. c) What is the selectivity between compounds 1 and 2? d) Determine the number of theoretical plates for compound 1. e) What is the HETP (in mm/plate)? (Hint: use only compound 1 for this calculation). f) What is the linear gas velocity (in cm/sec)? g) Calculate β, given β = rc /2df where rc is the radius of the column h) Calculate retention volume of the mobile phase, Vm. (hint: Convert velocity to flow using the cross sectional area of the column, πr2 ) i) Calculate the volume of the stationary phase, Vs. j) Calculate the Trennzahl number. Data: tm = 1.00 min (unretained peak) t1 = 3.52 min t2 = 8.15 min Wb1= 0.45 min Wb2= 0.75 min Wh1 = 0.22 min Wh2 = 0.25 min
Chemistry
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Chapter1: Chemical Foundations
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Question
Use the following data and the gas chromatogram from a 20m x 0.30mm x 0.50μm capillary
column to answer the following questions:
a) What is the resolution between peaks 1 and 2?
b) Calculate the retention factor range for this separation.
c) What is the selectivity between compounds 1 and 2?
d) Determine the number of theoretical plates for compound 1.
e) What is the HETP (in mm/plate)? (Hint: use only compound 1 for this calculation).
f) What is the linear gas velocity (in cm/sec)?
g) Calculate β, given β = rc /2df where rc is the radius of the column
h) Calculate retention volume of the mobile phase, Vm. (hint: Convert velocity to flow using the
cross sectional area of the column, πr2
)
i) Calculate the volume of the stationary phase, Vs.
j) Calculate the Trennzahl number.
Data: tm = 1.00 min (unretained peak)
t1 = 3.52 min
t2 = 8.15 min
Wb1= 0.45 min
Wb2= 0.75 min
Wh1 = 0.22 min
Wh2 = 0.25 min
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