2015-12. Detective Work, Part II: Physical Problems with the Column

Particulate matter from the sample or the system can cause havoc in the chromatogram. LCGC 33(12) 894-899 (2015) 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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2012-12. Avoiding Refractive Index Detector Problems

The refractive index detector can be frustrating to use because of its extreme sensitivity to temperature and other variables. However, it can see things that no other detector can see. LCGC 30(12) 1032-1037 (2012) John W. Dolan Erratum: see 30(10)

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2008-12. LC Pumps

After more than 40 years, the reciprocating-piston pump remains at the heart of the LC system. LCGC 26(12) 1168-1174 (2008) John W. Dolan

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1992-7. LC Problem Guide

“My system died” is a common laboratory lament. Use this guide to find out what broke and how top fix it. LCGC 10(7) 508-514 (1992) John W. Dolan

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