TY - JOUR
T1 - Flow-through tubular iodide and bromide selective electrodes based on epoxy resin heterogeneous membranes
AU - Alegret, S.
AU - Florido, A.
AU - Lima, J. L.F.C.
AU - Machado, A. A.S.C.
PY - 1989/1/1
Y1 - 1989/1/1
N2 - Tubular all-solid-state iodide and bromide selective electrodes with channels drilled through the crystalline heterogeneous membranes have been prepared for use in flow-injection analysis (FIA). The membranes, made with AgX/Ag2S powdered mixtures (X = I, Br) dispersed in a non-conductive epoxy resin, were assembled inside a hollow cylindrical support of conductive epoxy resin. The response characteristics of these detectors, in a low-dispersion FIA system, have been evaluated. Both show a Nernstian response over the range between 5 × 10-5 and O.1M X-, good reproducibility and fast response, which allows a sampling rate of 60/hr. Operational pH ranges from 2.5 to 11 and from 3 to 10 were obtained for the iodide and bromide electrodes respectively. Iodide must be absent in determinations with the bromide electrode. © 1989.
AB - Tubular all-solid-state iodide and bromide selective electrodes with channels drilled through the crystalline heterogeneous membranes have been prepared for use in flow-injection analysis (FIA). The membranes, made with AgX/Ag2S powdered mixtures (X = I, Br) dispersed in a non-conductive epoxy resin, were assembled inside a hollow cylindrical support of conductive epoxy resin. The response characteristics of these detectors, in a low-dispersion FIA system, have been evaluated. Both show a Nernstian response over the range between 5 × 10-5 and O.1M X-, good reproducibility and fast response, which allows a sampling rate of 60/hr. Operational pH ranges from 2.5 to 11 and from 3 to 10 were obtained for the iodide and bromide electrodes respectively. Iodide must be absent in determinations with the bromide electrode. © 1989.
U2 - 10.1016/0039-9140(89)80162-6
DO - 10.1016/0039-9140(89)80162-6
M3 - Article
SN - 0039-9140
VL - 36
SP - 825
EP - 829
JO - Talanta
JF - Talanta
IS - 8
ER -