A new procedure for the construction of flow-through optodes. Application to determination of copper (II).
A new procedure for constructing an optical fibre reflectance, bulk optode membrane type, sensor is presented. The optode membrane consists of a plasticized poly (vinyl chloride) membrane in which the ionophore is dissolved, entrapped in a cellulose support. The new optode with the dye indicator 1-(2-pyridylazo)-2-naphthol (PAN) was incorporated in a new flow-through cell and the injection system was optimized to determine Cu (II) at 567 nm in the range 5 x 10(-5)-10(-3) M. The response was reproducible and the optode can be regenerated using 10(-2) M EDTA followed by water. The method was applied to the determination of copper in real samples.
Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, Spain. spedreno@fcu.um.es
C
C
Sanchez-Pedreño
J A
JA
Ortuño
M I
MI
Albero
M S
MS
Garcia
J C
JC
Garcia de las Bayonas