African Journal of
Pure and Applied Chemistry

  • Abbreviation: Afr. J. Pure Appl. Chem.
  • Language: English
  • ISSN: 1996-0840
  • DOI: 10.5897/AJPAC
  • Start Year: 2007
  • Published Articles: 355

Table of Content: December 2012; 6(14)

December 2012

An overview of applications of pre-column derivatization reactions for the liquid chromatographic analysis of pharmaceuticals and other compounds

The applications of various pre-column derivatization reactions are presented in this review. The reactions are particularly applicable for various detection techniques [ultraviolet (UV), fluorescence, chemiluminscence, enantiomeric determination and mass spectrometry (MS)] in liquid chromatographic analysis of drugs and related compounds in various matrices. This review discovered that an improvement in reaction...

Author(s): Olajire A. Adegoke

December 2012

Kinetics and thermodynamic studies of adsorption of malachite green onto unmodified and EDTA-modified groundnut husk

A batch experiment was applied to study the adsorption of malachite green from aqueous solution by unmodified and ethylene diamine tetraacetic acid (EDTA)-modified groundnut husk. The effect of initial dye concentration, temperature, contact time and pH on the sorption process was investigated. The Langmuir and Freundlich adsorption isotherms were applied to test the experimental data. The chemically modified groundnut...

Author(s): Bamgbose Janet Titilayo, Bamigbade Akeem Adesina, Nkiko Mojisola Olubunmi, Ahmed Sikiru Akinyeye and Ikotun Adebomi Ayodeji  

December 2012

Decolorization and mineralization of brilliant golden yellow (BGY) by Fenton and photo-Fenton processes

The decolorization and mineralization of an azo dye, brilliant golden yellow (BGY, max416 nm,  = 7.81 x 103 Lmol-1 cm-1) by Fenton and photo-Fenton processes were investigated. The rate of decolorization is strongly dependent on the pH, initial concentrations of the dye, Fe(II) and H2O2. The effect of these parameters has been studied and the optimum operational conditions of these two methods...

Author(s): Md. Ahsan Habib, Iqbal Mohmmad Ibrahim Ismail, Abu Jafar Mahmood and Md. Rafique Ullah

December 2012

Preliminary screening of aflatoxin level in maize (Zea mays L.) in some selected markets in Benue State, Nigeria

Preliminary screening of aflatoxin B1 levels in maize (Zea mays L.) sold in some markets of Benue State, Nigeria, was carried out using thin layer chromatography (TLC). Concentrated chloroform extracts of 10, 15 and 40 μl were used in diethylether - methanol - water solvent system in the ratio of 96:3:1. Moisture contents of the stored and oven-dried fresh maize collected from the markets were in the range...

Author(s): S. T. Ubwa, K. Asemave and G. O. Igbum

December 2012

New compounds based on anthracene as a good candidate for organic dye-sensitized solar cells: Theoretical investigations

The specific properties of organic-conjugated molecules and polymers are of great importance since they have become the most promising materials for the optoelectronic device technology such as solar cells. The use of low band gap materials is a viable method for better harvesting of the solar spectrum and increasing its efficiency. The control of the parameter of these materials is a research issue of ongoing interest....

Author(s): N. Belghiti, M. Bennani, M. Hamidi, S. M. Bouzzine and M. Bouachrine

December 2012

Determination and preconcentration of Mercury(II) from natural water and milk sample by Modified nano polyacrylonitrile fiber

A simple method was developed for the preconcentration of Mercury(II) based on the adsorption of its Modified nano polyacrylonitrile fiber (PANF) complex. PANF was prepared by addition of acrylic fibers to ethanolamine (EA) with different concentration solutions. The stability of a chemically Modified nano polyacrylonitrile fiber were determined especially in concentrated hydrochloric acid which was then used as a...

Author(s): Ali Moghimi and Majid Abdouss

December 2012

Synthetic modification of gedunin and comparative antibacterial activity of gedunin and 7-deacetoxy-7α-hydroxygedunin potassium salt

Gedunin, a highly oxidized triterpenoid was obtained from hexane extractive of stem wood of Entandrophragma angolense (Welw) C. D. C. of the family Meliaceae. The gedunin was dissolved in minimum methanol at 40°C and set aside in the dark for recrystallization. Pure gedunin crystals were obtained in 0.92% yield. Methanolic alkaline hydrolysis of the gedunin...

Author(s): Okhale, S. E., Amupitan, J. O., Ndukwe, I. G., Oladosu, P. O. and Okogun, J. I.

December 2012

Kinetics of the adsorption of hexavalent Chromium from aqueous solutions on low cost material

This study proposes a Jordanian Pottery (Pot-Jo) as a low cost adsorbent for the removal of chromium from aqueous solutions. The effect of contact time, initial concentration of Cr(VI), temperature and ionic strength on the adsorption of Cr(VI) onto Pot-Jo were studied and discussed. The equilibrium (qe) of adsorption of Cr(VI) onto pottery were found to be 20.287, 17.55, and 13.577 mg Cr(VI) per gram of pottery at...

Author(s): Khaldoun Al-Sou&#;od