Electrochemical sensing systems for arsenate estimation by oxidation of L-cysteine.
In this study, rapid electrochemical sensing systems for detection of arsenate by oxidation of L-cysteine are proposed. Three different sensing systems comprising of screen-printed electrode and standard electrodes were used for this study. The detector element i.e. L-cysteine was immobilized on the working electrodes of the transducers by in-situ polymerization of acylamide. The electrocatalytic oxidation of L-cysteine was performed by cyclic voltammentry and amperometry. All the systems presented linear response range up to 30 microgL(-1) of arsenic. The sensors were able to estimate arsenic below 10 microgL(-1) with a detection limit of 1.2-4.6 microgL(-1).
Sarkar
Priyabrata
P
Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata-700009, West Bengal, India. sarkarpriya@yahoo.com
Banerjee
Suchanda
S
Bhattacharyay
Dipankar
D
Turner
Anthony P F
AP
D020106:Acrylamide / Q000737:chemistry; D001149:Arsenates / Q000032:analysis*; D003545:Cysteine / Q000737:chemistry*; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D004867:Equipment Design; D010084:Oxidation-Reduction; D014159:Transducers; D014874:Water Pollutants, Chemical / Q000032:analysis*
D001149:Arsenates; D014874:Water Pollutants, Chemical; D020106:Acrylamide; D003545:Cysteine