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Chapter 0: Q31 P (page 1)

The efficiency of a gas chromatography column is measured by a parameter called plate height (H, m m) , which is related to the gas flow rate (u, mL/min) by the van Deemter equation: H = A + B / u + Cu , where A , B , and C are constants. Prepare a spreadsheet with a graph showing values of as a function of u for u =4,6,8,10,20,20,40,50,60,70,80,90 and 10 mL/min. Use the values A = 1.65 m m , B = 25.8 m m .m L/min, and C = 0.023 6 m m.min/mL.

Short Answer

Expert verified

The spreadsheet and the graph are in step 2 and 3.

Step by step solution

01

The given equation and values

The following van Deemter equation will be used to create a spreadsheet with a graph showing the values of H as a function of u.

H = A + B / u + Cu

In this equation, A = 1.65 m m , B = 25.8 m m .m L/min, and C = 0.023 6 m m.min/mL

02

The list of values

The following H values are listed in the table below, and they are used to create a graph.

The above list is according to the values of H.

03

The graph of given equation

The graph for H = A + B / u + Cu van Deemter equation would be as follows:

The above graph is according to the value of H.

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