http://nopr.niscair.res.in/handle/123456789/962 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/1147 Title: Removal of fluoride from commercial Syrian wet phosphoric acid by precipitation <br/> <br/>Authors: Abdulbaki, M A <br/> <br/>Abstract: The removal of fluoride from commercial Syrian wet phosphoric acid was studied by precipitation with different sodium and potassium salts under different experimental conditions: stoichiometric ratio, temperature and mixing time. The ideal conditions that give high removal, were determined. All the salts used were found to give high percentage of removal i.e. 95-97%. But, commercial sodium chloride is recommended due to economical reasons. <br/> <br/>Page(s): 430-431 http://nopr.niscair.res.in/handle/123456789/1146 Title: Differential pulse polarographic trace level determination of iodate <br/> <br/>Authors: Sharma, P; Songara, S <br/> <br/>Abstract: A detailed voltammetric study was carried out for iodate ion which has resulted in optimization of analytical conditions for its trace level determination using differential pulse polarographic method. Chlorate and bromate did not interfere. The detection limit was 0.6 µg/mL. The method has successfully been applied for the analysis of iodate in different matrices. <br/> <br/>Page(s): 427-429 http://nopr.niscair.res.in/handle/123456789/1145 Title: Synthesis and characterization of a new phase of titanium phosphate and its application in separation of metal ions <br/> <br/>Authors: Maheria, Kalpana; Chudasama, Uma <br/> <br/>Abstract: Amorphous Titanium Phosphate (TiP), an inorganic ion exchanger of the class of tetravalent metal acid (tma) salts has been synthesized by sol-gel method. TiP has been characterized by elemental analysis (ICP-AES), spectral analysis (FT-IR), thermal analysis (TGA and DSC) and X-ray diffraction studies. Chemical resistivity of the material has been assessed in various media- acids, bases and organic solvents. The Na ⁺ ion exchange capacity (IEC) has been determined and effect of heating on IEC studied. The distribution and elution behaviour of TiP towards several metal ions has been studied in different electrolyte media/concentrations. Based on the distribution studies a few binary metal ion separations have been achieved. <br/> <br/>Page(s): 423-426 http://nopr.niscair.res.in/handle/123456789/1144 Title: Simultaneous kinetic spectrophotometric determination of citric and ascorbic acid by H-point standard addition method <br/> <br/>Authors: Zarei, Kobra; Atabati, Morteza; Karimian, Najmeh <br/> <br/>Abstract: The H-point standard addition method was applied to kinetic data for simultaneous determination of citric and ascorbic acid or selective determination of ascorbic acid in presence of citric acid. The method is based on the difference in the rate of reaction of citric and ascorbic acid with copper(II)-ammonia complex. The linear dynamic ranges for the two analytes of citric and ascorbic acid are 0.80-1.15 x 10² and 0.70-10.00 mM, respectively. The proposed method was successfully applied for the determination of citric and ascorbic acid in some powdered drink mixtures and vitamin C tablet. <br/> <br/>Page(s): 417-422