John W. Dolan

John Dolan has been writing "LC Troubleshooting" for LCGC for over 25 years. One of the industry's most respected professionals, John is currently a principal instructor for LC Resources, Walnut Creek, California He is also a member of LCGC's editorial advisory board.

What do you do when an unexpected peak appears in the chromatogram?

What do you do when an unexpected peak appears?

What happens when the same method gives different retention times on different instruments?

What happens when the same method gives different retention times on different instruments?

No matter where LC is used, it is never immune to problems.

Changing to a "better" liquid chromatography column may not always produce the expected results.

Changing to a "better" liquid chromatography column may not always produce the expected results.

A mysterious autosampler problem is solved.

Liquid chromatography is never immune to unexpected problems.