S. Subashini and
Department of Chemical Engineering, Sri
Sivasubramaniya Nadar College of Engineering,
Kalavakkam ? 603 110, India
Author Email :
Aim: Beta vulgaris is an edible
plant whose roots and leaves are consumed. Beta vulgaris contain both
water soluble and insoluble oxalates. In the present study calcium oxalate
crystals were isolated from Beta vulgaris root.
characteristics and thermal stability of isolated crystals were analyzed
using various spectroscopic and microscopic methods such as SEM, TEM, FT-IR,
NMR, TGA and DSC.
Results: The crystalline
structure was confirmed by X-Ray Diffraction analysis with a 2θ value of
20?. Functional groups observed in FTIR and 1H-NMR spectrum
confirmed the presence of calcium oxalate in Beta vulgaris root isolate. The
presence of calcium with sharp peaks at 0.3 and 3.68 keV was confirmed using
EDS analysis. The size of calcium oxalate crystals in Beta vulgaris
root isolate was found within 100 nm by TEM with SAED. Thermal stability of
calcium oxalate crystals was found in the range of 150 to 200?C using TGA and
Interpretation: Calcium oxalate
crystals in Beta vulgaris are water insoluble and thermally stable.
Key words: Beta vulgaris,
Biogenic crystals, Calcium oxalate, Thermal stability
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