2012-7. Troubleshooting Basics, Part IV: Peak Shape Problems
What do you do when the peak shape changes? LCGC 30(7) 564-569 (2012) John W. Dolan Erratum: see 30(5)
Read More →What do you do when the peak shape changes? LCGC 30(7) 564-569 (2012) John W. Dolan Erratum: see 30(5)
Read More →Will and internal standard always improve data quality? LCGC 30(6) 474-480 (2012) John W. Dolan Erratum: see 30(4)
Read More →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%
Read More →What happens when the same method gives different retention times on different instruments? LCGC 30(4) 312-318 (2012) Justin Chow and John W. Dolan Erratum: (appreared in 30(6)) Equation 4 has a typographical error. It should read: Vm = 0.5 x 10^-3 x L x dc^2
Read More →Remember the Rule of One — change just one thing at a time LCGC 27(8) 606-610 (2009) John W. Dolan Erratum: LCGC 27(6), p 478. Table 1, in the third column, the next to last line should read 403913, not 36827, and the 36827 should shift down one row.
Read More →The best results depend on the correct choice of calibration model. LCGC 27(6) 472-479 (2009) John W. Dolan Erratum: Table 1, in the third column, the next to last line should read 403913, not 36827, and the 36827 should shift down one row.
Read More →It’s all in the perspective LCGC 27(5) 392-400 (2009) John W. Dolan Erratum for LCGC 27(3), p 226, Figure 1. y-axis should be 0-1000, not 0-2000.
Read More →How are the signal-to-noise ratio and imprecision related? LCGC 27(4) 306-312 (2009) John W. Dolan Erratum: In Figure 1, the signal, S, should be measured from the middle of the noise band to the top of the peak, not from the top of the noise band.
Read More →Deciding on a zero intercept LCGC 27(3) 224-230 (2009) John W. Dolan Erratum: Figure 1 has the y-axis mislabeled. It should be 0-1000, not 0-2000. Also, attempts to replicate the results from Table 1 will be a problem because the values in Table 1 are rounded and more significant figures […]
Read More →Are you stuck on which step to take next? LCGC 26(5) 440-446 (2008) John W. Dolan Erratum: equation 1, February 2007, LCGC 25(2), 142-152 contains an error summarized at the end of this article.
Read More →