2003-9. Honoring Readers

Celebrating 20 years of “LC Troubleshooting.” LCGC 21(9) 888-892 (2003) John W. Dolan erratum: note error here. 50% loss in N is not 7% loss in Rs, but 30%. SQRT(0.50) = 0.7 Rs left, so 30% gone.

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1994-1. Extra Peaks

Extra peaks — where do they come from? Here’s a method to help you find out. LCGC 12(1) 19-20 (1994) John W. Dolan erratum at 12(3) p 200 calculation errors associated with Figure 2: First, the width of the 10-min peak should have been 8.0 mm, not 0.8 mm. Second, […]

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1990-2. Problems with Small-Volume Columns

Small liquid chromatographic columns have become workhorses for routine analysis in many labs, but for the uninitiated, small columns can mean big problems. Short, small-particle, or microbore columns can be rendered useless by conditions that don’t affect traditional 25-cm columns. LCGC 8(2) 98-102 (1990) John W. Dolan and Dana C. […]

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