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Tag: late elution


2016-11. Reader’s Question: Early Eluted Peak

November 1, 2016

What could be causing a peak to be eluted before the column dead time? LCGC 34(11) 838-843 (2016) John W. Dolan

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2016-1. Detective Work, Part III: Strong Retention and Chemical Problems with the Column

January 1, 2016

Strongly retained sample compounds can caus various changes in the appearance of a chromatogram. LCGC 34(1) 20-25 (2016) John W. Dolan Errata: Note that there was a transposition error in this and two associated articles. In the referenced table, the words “Symptom” and “Cause” have been reversed. That is, “Cause” […]

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2013-8. Gradient Elution, Part VI: Ghost Peaks

August 1, 2013

Where do all those extra peaks come from? LCGC 31(8) 604-611 (2013) John W. Dolan

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2012-5. Extra Chromatographic Peaks – A Case Study

May 1, 2012

What do you do when an unexpected peak appears in the chromatogram? LCGC 30(5) 392-400 (2012) John W. Dolan Erratum: (from 30(7), on p 394, the calculation showed that 0.1% x 0.1% = 0.01%, when in fact is should have been 0.1% x 0.1% = 0.0001%

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2010-7. Where Did That Peak Come From?

July 1, 2010

A broad peak where it doesn’t belong is a classic sign of late elution. LCGC28(7) 518-523 (2010) John W. Dolan

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2001-1. Unexpected Peaks

January 1, 2001

Where did that extra peak come from? LCGC 19(1) 32-36 (2001) John W. Dolan

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2000-11. The Problem of Late Elution — A Case Study

November 1, 2000

When is the run over? LCGC 18(11) 1136-1140 (2000) Roy Lewis and John W. Dolan

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1999-3. Late Elution and Carryover Peaks — A Case Study

March 1, 1999

What’s the source of an extra peak in the second injection? LCGC 17(3) 230-234 (1999) Jin Y. Huang, Travis Culey, and John W. Dolan

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1989-10. Readers’ Questions

October 1, 1989

Keywords: LCGC 7(10) 822-826 (1989) John W. Dolan

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1988-5. Late Peaks and Gradient Reproducibility

May 1, 1988

Readers’ Questions LCGC 6(5) 388-390 (1988) John W. Dolan

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