New octyl-modified aleppo bentonite as support in gas chromatographic analysis Ramadan Abdul Aziz**, Aantakli Saad*, Birouty Ahmad** Department of Chemistry, Faculty of Sciences, University of Aleppo, Syria **Corresponding Author E-mail: dramadan@scs-net.org
*Corresponding Author E-mail: antakli@scs-net.org
**dramadan@scs-net.org
Online published on 22 September, 2017. Abstract A new Octyl-modified Aleppo Bentonite support was developed. The method is based on the thermal treatment of Aleppo Bentonite which have diameter particles (150–250 µm) and washed by concentrated HCl (BA). BA was chlorinated by dimethyldichlorosilane, then, the resultant product was reacted with Griniard reagent as octylmagnesium bromide to obtain (BAOctyl). The surface properties of BA and BAOctyl were characterized by nitrogen adsorption at 77K (BET) and differential thermal analysis (DTA). It was found that, the BET surface areas (SBET) were 6.39 and 2.71 m2/g, the total pore volume vp were 0.0161 and 0.0072 mL/g and the mean pores radii ra were 50.39 and 53.14 Å, respectively. Twenty eight hydrocarbons components in gasoline were determined by using BAOctyl as support in GC. The principle gasoline components groups (total C5 to total C10) percent were presented as follows: 20.265%, 20.691%, 24.383%, 17.110%, 11.595% and 1.611% (95.655%). The developed support is applied for the determination of some hydrocarbons compounds (as automobile gasoline). The column of BAOctyl provided excellent symmetrical peaks and less retention time compared with BAPhenyl-modified support. Top Keywords Octyl-modified Aleppo Bentonite, BET, DTA, GC, Gasoline. Top |