2011-11. Locating Precision Problems
Too much variability in your liquid chromatography method? Here’s a look at how to track down the source of the problem. LCGC 29(11) 982-986 (2011) John W. Dolan
Read More →Too much variability in your liquid chromatography method? Here’s a look at how to track down the source of the problem. LCGC 29(11) 982-986 (2011) John W. Dolan
Read More →Why aren’t retention times constant? LCGC 25(4) 360-366 (2007) John W. Dolan
Read More →With trace analysis, a lower limit of detection is always welcomed. LCGC 25(2) 142-152 (2007) John W. Dolan Errata: There is an error in equation 1 of this month’s column. See LCGC 26(5) (2008) for complete explanation. In the November installment of “LC Troubleshooting” [LCGC 24(11) 1184-1190 (2006)], the y […]
Read More →How is the detection limit determined? LCGC 23(12) 1256-1260 (2005) John W. Dolan
Read More →Just how good are your gradients? LCGC 22(10) 982-988 (2004) Jonathan J. Gilroy and John W. Dolan
Read More →Chromatographers can use a simple set of tests to check system performance. LCGC 20(9) 842-848 (2002) Gerald Hall and John W. Dolan Note that there are several errors in this document. The y-axis scale on Figure 1 should be microvolts, not millivolts. The calculations for Figure 1 are OK, but […]
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 →Twenty years of design refinements have led to the improved performance of today’s pumps. LCGC 9(5) 344-348 (1991) John W. Dolan
Read More →LCGC 4(5) 416-420 (1986) John W. Dolan
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