A reader’s problem of a method that fails the repeatability requirement of the system suitability test serves as an example of how to approach liquid chromatography (LC) method troubleshooting. LCGC 34(12) 900-904 (2016) John W. Dolan
Read More →The potential causes are considered for peak distortion for the first two peaks in the chromatogram. LCGC 33(7) 464-469 (2015) John W. Dolan
Read More →A mysterious autosampler problem is solved. LCGC 30(2) 112-118 (2012) Michael W. Dong, Kelly Louie, and John W. Dolan
Read More →How to get free consultation from a dozen experts. LCGC 24(3) 268-276 (2006) John W. Dolan Note, the web address of Chromatography Forum has changed from chromforum.com to chromforum.org
Read More →A full measure of tips for reliable gradient methods. LCGC 23(9) 1008-1012 (2005) John W. Dolan
Read More →Autosamplers can be great time-savers, but they have their own set of problems. LCGC 19(5) 478-482 (2001) John W. Dolan
Read More →Several variables can affect autosampler injection precision and may prevent the instrument from passing performance tests LCGC 16(10) 910-914 (1998) John W. Dolan
Read More →A properly operating autosampler is an essential tool for precision in a liquid chromatography system. LCGC 15(6) 516-521 (1997) John W. Dolan
Read More →What goes into an injector doesn’t necessarily come out — at least not in the expected manner. LCGC 14(7) 562-566 (1996) John W. Dolan
Read More →Automation doesn’t necessarily mean high precision. This month’s LC Troubleshooting discusses ho adding a few steps to a standard operating procedure can increase an autosampler’s reliability. LCGC 13(10) 788-790 (1995) John W. Dolan and Travis Culley
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