ESTIMATIONS OF D-ERYTHROSE BY KINETIC CERIMETRIC METHOD

Publication Date : 05/05/2017

DOI : 10.22623/IJAPSA.2017.3029.D61S3


Author(s) :

Anand G.Fadnis*.


Volume/Issue :
Volume 3
,
Issue 4
(05 - 2017)



Abstract :

Abstract Estimation of D-Erythrose ,an aldo tetrose by kinetic cerimetric method has been carried out after elaborating the kinetic and mechanistic features of the indicator electron transfer reaction which can be expressed as C4H8O4 + 2Ce(IV) +H2O → C3H6O3+2Ce(III)+2H + + HCOOH This reaction showed first order kinetics with respect to initial concentarations of reacting species cerium(IV),D- erythrose and sulphuric acid under the experimental pseudo first order conditions and a free radical mechanism producing glycerol as initial reaction product. The observed decreasing absorbance with time at different initial concentrations of D-erythrose from 0.50 x 10-2 mol dm-3 to 3.0 x 10-2 mol dm-3 has been used for the . cerimetric estimations of simulated samples of D-erythrose adopting (a) Rate constant, (b) variation of absorbance at fixed time (c) variation of time at fixed absorbance (d) One point and (e) Two point methods using respective calibration plots .The consistency and reproducibility of these and earlier results have clearly showed that kinetic cerimetric estimations of aldo sugars can be used as an alternative/additional analytical method to the existing traditional estimation methods in the present day laboratory conditions. ****************************** Mailing address:103 Vishnu Vihar,1053 Khatiwala Tank-Indore 452014


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