J. Alonso et al., FLOW-THROUGH TUBULAR ION-SELECTIVE ELECTRODES RESPONSIVE TO ANIONIC SURFACTANTS FOR FLOW-INJECTION ANALYSIS, Analytica chimica acta, 308(1-3), 1995, pp. 115-121
A flow-injection system based on potentiometric detection and designed
for the monitoring of anionic surfactant content of printing plates w
ashing solutions is described. Two new PVC membrane ion-selective elec
trodes, constructed with an all-solid-state tubular flow-through desig
n, are used. The sample, with high ionic strength and extremely alkali
ne pH, is conditioned in a two-channel flow-injection system, allowing
for surfactant determination in the 1X10(-4) to 1X10(-3) M range, wit
h NaOH contents up to 0.3 M.