NOPR Collection:

Metal ion chromatography on sodium diethyldithiocarbamate

2010-01-03T16:30:20Z

Title: Metal ion chromatography on sodium diethyldithiocarbamate Authors: Rathore, H S; Kumar, M; Ishratullah, K Abstract: Metal ions such as Pb²⁺, Hg²⁺, Hg₂²⁺, Cd²⁺, Zn²⁺, Cu²⁺, Co²⁺, Ni²⁺, Fe³⁺, Fe²⁺and Mn²⁺ have been chromatographed on paper strips impregnated with sodium diethyldithiocarbamate and its admixtures with SiO_2,CaSO₄, Na₂CO₃, NaCl, NH₄Cl, EDTA, NaOH, CaCO₃, Na₂HPO₄ and H₃PO₄. Common solvents namely acetone, acetonitrile, benzene, carbon tetrachloride, isopropanol, aqueous NaDDC and distilled water have been used as mobile phases. Several binary separations of heavy metal ions have been achieved experimentally. Page(s): 84-87

Simultaneous spectrophotometric determination of formoterol fumarate and budesonide in their combined dosage form

2009-12-31T16:30:16Z

Title: Simultaneous spectrophotometric determination of formoterol fumarate and budesonide in their combined dosage form Authors: Prasad, A V S S Abstract: A new UV spectrophotometric method for the simultaneous determination of formoterol fumarate and budesonide in their combined dosage form has been developed. The _max values for formoterol fumarate and budesonide in methanol medium were found to be 217 nm and 252 nm respectively. The results of analysis by this method have been found to be precise and accurate. Page(s): 81-83

Interelemental interference correction by computational method in flame atomic absorption spectroscopy (FAAS): Study of Fe-Mn system in silico-manganese ferro-alloy

2010-01-03T16:30:19Z

Title: Interelemental interference correction by computational method in flame atomic absorption spectroscopy (FAAS): Study of Fe-Mn system in silico-manganese ferro-alloy Authors: Rao, A S; Gupta, K K; Singh, M; Upadhyay, A K; Sircar, J K Abstract: An accurate method for the estimation of iron and manganese by flame atomic absorption spectrometry (FAAS), correcting the inter-elemental interference, using an ISO accepted two parameter computational method has been developed for silico-manganese samples. Iron and manganese are determined at 372 and 403.1 nm, respectively, using air-acetylene flame. Interelemental interferences can also be overcome by removing one of the interferant ion by precipitating it with zinc oxide. The evaluation of the methodology has been done using Fe-Mn synthetic mixtures, as well as in certified reference materials. The standard deviation is within 1% in majority of samples studied. Some real samples have also been analysed by the present method and the results compared with titrimetric method of analysis. Page(s): 77-80

Volume and transport properties of binary liquid systems of acrylonitrile with aromatic ketones at 308.15 K

2010-01-05T16:30:18Z

Title: Volume and transport properties of binary liquid systems of acrylonitrile with aromatic ketones at 308.15 K Authors: Tangeda, Savitha Jyostna; Nallani, Satyanarayana Abstract: The densities and viscosities for the binary mixtures of acrylonitrile with aromatic ketones (acetophenone, propiophenone, paramethyl acetophenone and parachloro acetophenone) have been reported over the entire range of mole fraction at 308.15 K. The excess molar volume (V^E) and deviation in viscosity () are fitted to a Redlich-Kister type equation. Other parameters like excess Gibbs free energy of activation of viscous flow (G^*E) and Grunberg-Nissan interaction parameter (d') are also utilized in the qualitative analysis to elicit the information on the nature of the bulk molecular interactions of acrylonitrile + aromatic ketone binary mixtures. Page(s): 71-76