Anal. Chem. 2006, 78, 3839
CORRECTIONS Microbial Metabolomics with Gas Chromatography/Mass Spectrometry Maud M. Koek,* Bas Muilwijk, Marie 1 t J. van der Werf, and Thomas Hankemeier (Anal. Chem. 2006, 78, 1272-1821).
On page 1275, Table 2, the quantification limits of standards spiked to cell extracts are given in Mmol/g DGT; this should actually be µmol/g DWT. Also in the table footnote c, mmol/g of dry weight should be replaced with µmol/g of dry weight. AC060521Q 10.1021/ac060521q Published on Web 04/06/2006
Results with an Apparatus for Pressurized Planar Electrochromatography Allyson L. Novotny, David Nurok,* Randall W. Replogle, Gregory L. Hawkins, and Robert E. Santini* (Anal. Chem. 2006, 78, 2823-2831).
The first sentence of the section titled “Pre-equilibration of the Sorbent Layer” is incomplete and refers to ref 4. The correct reference is ref 13, which is not in the original report. The correct references are below. The incorrect sentence should be replaced with the following: Dzido et al.13 have reported that chromatographic efficiency is increased when the plate is pre-equilibrated with the mobile phase for 18 h before PEC. Dzido et al.4 have also reported that reproducibility is improved when the sorbent layer is preequilibrated with the mobile phase and the pre-equilibrated liquid is then used as the run buffer in PPEC. Retention increases when pre-equilibration is increased from 3 s to 1 min, but there is no further increase in retention with longer periods of pre-equilibration. (4) Dzido, T. H.; Mroz, J.; Jozwiak, G. W. J. Planar Chromatogr. 2004, 17, 404-410. (13) Dzido, T. H.; Majewski, R.; Polak, B.; Golkiewicz, W.; Soczewinski, E. J. Planar Chromatogr. 2003, 16, 176-182.
AC060702S 10.1021/ac060702s Published on Web 05/02/2006
10.1021/ac060521q CCC: $33.50 Published on Web 04/06/2006
© 2006 American Chemical Society
Analytical Chemistry, Vol. 78, No. 11, June 1, 2006 3839
