July 2013

Preconcentration of trace Ni (II) using C18 disks modified cyclodextrin–chitosan/nano graphene oxide

A novel, sensitive and effective method has been developed for preconcentration of Ni on C18 disks modified cyclodextrin–chitosan/nano graphene oxide. Simple chemical bonding method to synthesize cyclodextrin–chitosan/nano graphene oxide (CCGO) was reported. The adsorption behaviors of Ni (II) in aqueous solution on CCGO were systematically investigated. The procedure is based on the selective formation...

Author(s): Ali Moghimi

July 2013

Acrylonitrile derivatives as corrosion inhibitors for Cu10Ni alloy in 0.5 M hydrochloric acid solution

Corrosion inhibition of Cu10Ni alloy in 0.5 M HCl solution using acrylonitrile derivatives namely: (E)-2-(1H-indole-3-carbonyl)-3-(2-oxo-2-phenylethylthio)-3-(phenylamino)acrylonitrile(a),(E)-2-(1H-indole-3-carbonyl)-3-mercapto-3-(phenylamino)acrylonitrile(b)and(Z)-2-(1H-indole-3-carbonyl)-3 phenylacrylonitrile (c) was investigated by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and...

Author(s): A. S. Fouda, M. Abdallah and M. El-Hoseiny

July 2013

A comparative investigation on the field performance of two mineral diesel engine oil

The technique of inductively coupled plasma (ICP), has been employed for monitoring the level of 24 different elements in two equivalent engine oils. Tracing have been made at 0, 500, 1000, 2000, 2500, 3000, 4000, and 6000 km of operation. In the case of both of the oils, the results indicate decreasing as well as increasing trends in concentrations of different elements. The obtained data have been interpreted based on...

Author(s): Sahar Peyman, Abolfazl Semnani, Hamid Shakoori Langeroodi, Ali Reza Zangenehand Saeed  Habibollahi

July 2013

Sample ion/sample molecule reactions in gas chromatography/chemical ionization mass spectrometry of polyethylene glycols and polyethylene glycols dimethyl ethers

Sample ion/sample molecule (SISM) reactions frequently occur under chemical ionization (CI) conditions with large sample size polar compounds, and are useful in forming MH+ions for molecular weight determination. Studies about the variation of chemical ionization spectra with sample size were made in this report using gas chromatography/mass spectrometry, GC/MS, to observe the relative abundances of the major ions in...

Author(s): Adebayo O. Onigbinde, Burnaby Munson and Bamidele M. W. Amos-Tautua