For the Restek Ultra Aq, I used the column comparison database at HPLC Columns - HPLC column selectivity measurements of more than 600 reversed phase columns from over 30 manufacturers . I did not find an Agilent column which displays identical selectivity (as defined by an Fs value < 3). The closest comparison would be Poroshell 120 SB-C18 with an Fs value of 10.40. I attached here an LCGC article where John Dolan & Lloyd Snyder talk about the Hydrophobic Subtraction Model and how to interpret the Fs value. Happy reading :-)....
Others with hands-on experience with both of the columns you list might point you in a more specific direction.
For the Restek Ultra Aq, I used the column comparison database at HPLC Columns - HPLC column selectivity measurements of more than 600 reversed phase columns from over 30 manufacturers . I did not find an Agilent column which displays identical selectivity (as defined by an Fs value < 3). The closest comparison would be Poroshell 120 SB-C18 with an Fs value of 10.40. I attached here an LCGC article where John Dolan & Lloyd Snyder talk about the Hydrophobic Subtraction Model and how to interpret the Fs value. Happy reading :-)....
Others with hands-on experience with both of the columns you list might point you in a more specific direction.
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