Application Notes
Separation of Para- and Meta-Xylene on Capillary GC Column
Para- and meta-xylene were more completely resolved on a Carbowax capillary column than on columns typically used for this determination.
BTEX Aromatics and the Separation of Para- and Meta-Xylene on a Carbowax Econo-Cap Column, Alltech Application Note ANE006, 1997.
The GC capillary column separation of para- and meta-xylene on Carbowax, a polyethylene glycol stationary phase was demonstrated. The column, Carbowax Econco-Cap (Part No. 19659), 30m x 0.53mm x 1.2µm was installed on a HP 5890 gas chromatograph equipped with a FID. A mixture of eleven aromatic hydrocarbons was directly injected: benzene, toluene, ethyl benzene, p-xylene, m-xylene, o-xylene, propyl benzene, chlorobenzene, m-dichlorobenzene, p-dichlorobenzene and o-dichlorobenzene.
The initial temperature of 55°C was held for 7.5 minutes until the m-xylene eluted. The GC oven was then programmed to increase to 150°C at 10°C/min. Ethyl benzene and the para- and meta-xylene isomers were not completely separated, but the resolution was said to be better than with the column typically used for this determination, an EPA Method 624 capillary column.
Key Analyte(s)
1,2-dichlorobenzene1,2-dichlorobenzene is a chlorinated liquid used as a degreasing agent and in dye production. It is most often measured using GC/ECD, ELCD and GC/MS methods.
1,3-dichlorobenzene1,3-dichlorobenzene is a chlorinated liquid used as a fumigant and insecticide. It is most often measured using GC/ECD, ELCD and GC/MS methods.
1,4-dichlorobenzene1,4-dichlorobenzene is a crystalline solid chlorinated aromatic used as a moth repellant and deodorant. It is msot often measured using GC/ECD, ELCD and GC/MS.
benzeneBenzene is an aromatic hydrocarbon liquid derived from petroleum used in the production of gasoline and many industrial chemicals. It is most often measured in water, air, gasoline and soil using GC/FID, PID and GC/MS.
chlorobenzeneChlorobenzene is an aromatic hydrocarbon liquid used in the manufacture of phenol and aniline. It is most often measured using GC/PID, ECD, ELCD and GC/MS methods.
ethylbenzeneEthyl benzene is an aromatic hydrocarbon liquid used in the production of styrene monomer. It is most often measured using GC/PID, FID and GC/MS.
m-xylenem-xylene is an aromatic hydrocarbon liquid used as a solvent and in dye manufacturing. It is most often measured using GC/PID, FID and GC/MS.
o-xyleneo-xylene is an aromatic hydrocarbon liquid used in the manufacture of phthalic anhydride. I tis most often measured using GC/PID, FID and GC/MS.
p-xylenep-xylene is an aromatic hydrocarbon liquid used in the synthesis of polyester resins like Dacronand Mylar. It is most often measured using GC/PID, FID and GC/MS.
More AnalytesEquipment
Alltech Econo-Cap Capillary ColumnsAlltech Econo-Cap capillary columns are a family of batch tested polyimide coated fused silica GC columns manufactured and sold by Alltech Associates.
Technique
GC/FIDIn GC/FID, the FID or flame ionization detector detects analytes by measuring an electrical current generated by electrons from burning carbon particles in the sample.
Source
Alltech Associates, Inc.Alltech Associates, Inc., one of the leading suppliers of HPLC columns, manufactures and distributes HPLC, GC and IC columns, accessories and consumables and maintains a large searchable database of application notes and chromatograms on its website.
