Capillary gas chromatography of alkylbenzenes

A new method for predicting the Kovats retention indices of plysubstituted alkylbenzenes from those of benzene,monosubstituted alkylbenzenes and disubstituted alkylbenzenes is presented.The computer can recognize the molecular structure of the polysubstituted alkylbenzenes,index the date\|base to obtain the Kovats retention indices of fundamental compounds and output the predicted results automatically at once only by inputting the name of the compound,which promoted the practical applicability of the predicting method.

Alkylbenzenes

Kovats retention index

Topological index

Retention time

Source

Cite

Citations (0)

Prediction of retention indices of aromatic hydrocarbons on phases of different polarity

Journal of Chromatography A (1981)

D. Papazova N. Dimov

Alkylbenzenes

Kovats retention index

Retention time

Polarity (international relations)

Molecular mass

Structural isomer

10.1016/s0021-9673(00)82361-4

Cite

Citations (9)

Capillary gas chromatography of alkylbenzenes

Journal of Chromatography A (1976)

L. Soják J.A. Rijks

Alkylbenzenes

Kovats retention index

Capillary gas chromatography

Retention time

10.1016/s0021-9673(00)86812-0

Cite

Citations (64)

[The application quantitative structure-retention relationship of GC to aid MS qualitative analysis].

PubMed (1999)

Zhu X L Zhang J Chen L Wang Xin Che

In this paper, a method, based on the prediction of the Kovats retention indices of related polysubstituted alkylbenzenes from the indices of benzene, monsubstituted alkylbenzenes and disubstituted alkylbenzenes, was used to aid qualitative analysis with mass spectrometry alone. A disproportinated aromatic product and the basic compounds of alkylbenzene were analyzed with gas chromatography isothermally at 100 degrees C separately. In order to cut down the analysis time and increase the resolution, the disproportionated aromatic product was analyzed using temperature programming with gas chromatographymass spectrometry (GC-MS). The Kovats retention indices of the basic compounds were determined and those of the polysubstituted alkylbenzenes were predicted with the method which was proposed by us previously. The isomers of polysubstituted alkylbenzenes have similar mass spectra, so they can not be identified unambiguously by MS alone. For the differences of the Kovats retention index between isomers of polysubstituted alkylbenzenes are larger, it can be identified by matching the experimental retention indices with the predicted ones. The positional isomers of polysubstituted alkylbenzenes which are very difficult to be interpreted by MS alone have been identified explicitly.

Alkylbenzenes

Kovats retention index

Source

Cite

Citations (1)

Capillary gas chromatography of alkylbenzenes

Journal of Chromatography A (1977)

L. Soják J. Janák J.A. Rijks

Alkylbenzenes

Kovats retention index

Homologous series

Methylene