Recent update of the various sources originating ghost peaks in gas chromatography: A review

The Formation of Small Amounts of Cyclopropane during Pulsed Pyrolysis of C4–C5 Acyclic Alkanes in the Adiabatic Compression Reactor

“…), but is injected from a gas sampling valve directly into the column; the peak identified as cyclopropane is eluted from alumina at an isotherm of 100 • C when analyzed according to the standard program, and at 50 • C when analyzed according to the modified program in an additional series of experiments. There were no acids, bases, alcohols or water in the sample that may have contributed to ghost peaks [75]. There are no peaks caused by previous sample entry-the peak attributed to cyclopropane appeared in the first analysis on all columns.…”

Esterification of fluorinated aromatic carboxylic acids with methanol by using UiO-66-NH2 as a heterogeneous catalyst and process optimization by the Taguchi method

“…4 Also, the derivatizing agent, like penta-uorobenzyl bromide used in CI, 4 is a lachrymator and may create many side products as ghost peaks in the chromatogram. 5 The solid heterogeneous catalyst can overcome this disadvantage as they can be easily separated from the reaction mixture and can be reused for repeated experiments, as compared by Chopade et al 6 Many authors reported using heterogeneous catalysts in esterication/transesterication reactions. [6][7][8][9][10][11] Several heterogeneous catalysts such as zeolites, silicates, and metallic salts have been studied for esterication reactions, but MOF provides high selectivity as they are organic/ inorganic hybrids and show both organic and inorganic properties.…”