Editor-in-Chief İlkay Küçükgüzel Associate Editor Esra Tatar Online ISSN 2630-6344 Publisher Marmara University Frequency Bimonthly (Six issues / year) Abbreviation J.Res.Pharm. Former Name Marmara Pharmaceutical Journal
Marmara Pharmaceutical Journal 2017 , Vol 21 , Issue 2
Physicochemical, Thermal and Spectroscopic Characterization of Sodium Selenate Using XRD, PSD, DSC, TGA/DTG, UV-vis, and FT-IR
Mahendra Kumar Trivedi1,Kalyan Kumar Sethi2,Parthasarathi Panda2,Snehasis Jana2
1Trivedi Global, Inc., Henderson, Nevada-89052, USA
2Trivedi Science Research Laboratory Pvt. Ltd., Bhopal-462026, Madhya Pradesh, India
DOI : 10.12991/marupj.300796 Sodium selenate is an important inorganic compound, but lacks reliable and accurate physico-chemical and spectral characterization information. This article described the in-depth physicochemical, thermal, and spectroscopic characterization of sodium selenate using various analytical techniques. The powder X-ray diffractogram showed welldefined, narrow and sharp peaks indicating that sodium selenate is crystalline in nature. The crystallite size was found to be in the range of 28.75 to 49.97 nm. The average particle size was found to be of 3.93 (d10), 14.44 (d50), and 40.65 (d90) μm with an average surface area of 0.676 m2/g. The differential scanning calorimetry showed the endothermic inflation at 588.81 °C with the latent heat of fusion 103 J/g. The thermogravimetric analysis revealed two steps of the thermal degradation process. Similarly, the differential thermogravimetric analysis exhibited the major peaks in the thermogram and disclosed Tmax at 852.65 °C. This indicated sodium selenate thermally more stable in nature. The UV-visible spectrum showed maximum absorbance at 205.1 nm (λmax). The Fourier transform infrared spectrum showed a peak at 888 cm-1 due to the Se-O stretching. These information would be very much useful in the field of nutraceuticals/ pharmaceuticals and other industries using sodium selenate as an ingredient. Keywords : Sodium selenate, Crystallite size, Particle size, Thermal analysis, Surface area
Marmara University