TY - JOUR

T1 - Interdigitated electrode array based sensors for environmental monitoring of caesium

AU - Nickson, I. D.

AU - Boxall, C.

AU - Port, S. N.

PY - 2010

Y1 - 2010

N2 - The requirement for on-line and in-situ monitoring of analytes in process and effluent streams and in ground waters has become increasingly more important in recent years. We therefore describe the development of the transduction element for a fully automated online instrument for the detection of caesium. The sensor layer for this instrument employs an Ion Selective Conductimetric Microsensor (ISCOM) as the detector. This is based upon a plasticized polymeric membrane incorporating a selective ionophore, overlaying two interdigitated microelectrode arrays. A direct relationship has been observed between the bulk conductance (as determined by the microelectrodes) of the ionophore loaded membrane and the concentration of the primary ions in solution.Caesium selective ISCOMs were prepared using an ion selective membrane containing the commercially available ionophore Calix[6] arene-hexaacetic acid hexaethyl ester, polyvinylchloride (PVC) and plasticiser Nitrophenylether (NPOE). The relative levels of membrane components have also been varied in order to further enhance the ISCOM response. We also present preliminary data concerning the caesium selectivity with respect to a range of possible interferents, including rubidium.

AB - The requirement for on-line and in-situ monitoring of analytes in process and effluent streams and in ground waters has become increasingly more important in recent years. We therefore describe the development of the transduction element for a fully automated online instrument for the detection of caesium. The sensor layer for this instrument employs an Ion Selective Conductimetric Microsensor (ISCOM) as the detector. This is based upon a plasticized polymeric membrane incorporating a selective ionophore, overlaying two interdigitated microelectrode arrays. A direct relationship has been observed between the bulk conductance (as determined by the microelectrodes) of the ionophore loaded membrane and the concentration of the primary ions in solution.Caesium selective ISCOMs were prepared using an ion selective membrane containing the commercially available ionophore Calix[6] arene-hexaacetic acid hexaethyl ester, polyvinylchloride (PVC) and plasticiser Nitrophenylether (NPOE). The relative levels of membrane components have also been varied in order to further enhance the ISCOM response. We also present preliminary data concerning the caesium selectivity with respect to a range of possible interferents, including rubidium.

KW - ION-SELECTIVE ELECTRODES

KW - EXPERIMENTAL-DESIGN METHODOLOGY

KW - LIQUID-PHASE MICROEXTRACTION

KW - MEMBRANE ELECTRODES

KW - OPTIMIZATION

KW - SYSTEM

KW - DERIVATIVES

KW - EXTRACTION

KW - IONOPHORES

KW - GROWTH

U2 - 10.1088/1757-899X/9/1/012044

DO - 10.1088/1757-899X/9/1/012044

M3 - Journal article

VL - 9

SP - -

JO - IOP Conference Series: Materials Science and Engineering

JF - IOP Conference Series: Materials Science and Engineering

SN - 1757-8981

IS - 1

M1 - 012044

T2 - Actinides 2009, the 8th International Conference on Actinide Science held on 12–17 July 2009 in San Francisco

Y2 - 12 July 2009 through 17 March 2012

ER -