Micellar extraction preconcentration of silver with thiazolylazo reagents into a nonionic surfactant phase at the cloud point

Metal ion extraction in microheterogeneous systems

“…The extraction of 10 −5 M Ag(I) in non-ionic polyoxyethylated alkylphenol micelles solubilising TAR is limited by the distribution [50] of the Ag:TAR complex whereas Ag:TAN allows an extraction yield >99% in the same conditions [46]. For ionic extractants, a temperature change (a decrease in this case) can also induce a separation at the Kraft temperature.…”

A simple non-extractive green method for the spectrophotometric sequential injection determination of copper(ii) with novel thiazolylazo dyes

“…A number of applications have been proposed regarding the determination of transition metals, such as copper, silver, chromium, nickel, zinc, etc., using TAN. [20][21][22][23][24] In addition, thiazolylazonaphthol dyes like TAN were successfully applied in ow injection analysis (FIA) 25 and sequential injection analysis (SIA). 26 In analytical chemistry surfactants have found their main use in spectrophotometry and uorimetry.…”