EnrichmentFree Rapid Detection of Phthalates in Chinese Liquor with Electrochemical Impedance Spectroscopy. A noninvasive realtime detection technique for phthalates in Chinese liquor is proposed in this paper. This method is based on the measurement of Faradaic impedance in the presence of a redox probe, Fe(CN)63xe2x88x924xe2x88x92, upon the absorption of phthalates to the graphene electrode surface. This absorption activity is according to the xcfx80xe2x80x93xcfx80 stacking interactions between phthalates and the graphene working electrode which allows direct sampling and analyte preconcentration. The absorption of phthalates retards the interfacial electrontransfer kinetics and increases the chargetransfer resistance (Rct). Numerical values of Rct were extracted from a simulation of electrochemical impedance spectroscopy (EIS) spectra with the corresponding equivalent circuit. Cathodic polarization was employed prior to EIS measurements to effectively eliminate the metal ion interference. The results yielded a detection limit of 0.024 ngL for diethyl phthalate (DEP) with a linear range from 2.22 ng to 1.11 xc2xb5g. These results indicate a possibility of developing a household sensor for phthalate determination in Chinese liquor.

Potentiometric ETongue System for GeosminIsoborneol Presence Monitoring in Drinkable Water A potentiometric Etongue system based on lowselective polymeric membrane and chalcogenideglass electrodes is employed to monitor the tasteandodorcausing pollutants, geosmin (GE) and 2methylisoborneol (MIB), in drinkable water. The developed approach may permit a lowcost monitoring of these compounds in concentrations near the odor threshold concentrations (OTCs) of 20 ngL. The experiments demonstrate the success of the Etongue in combination with partial least squares (PLS) regression technique for the GEMIB concentration prediction, showing also the possibility to discriminate tap water samples containing these compounds at two concentration levels: the same OTC order from 20 to 100 ngL and at higher concentrations from 0.25 to 10 mgL by means of PLSdiscriminant analysis (DA) method. Based on the results, developed multisensory system can be considered a promising easytohandle tool for express evaluation of GEMIB species and to provide a timely detection of alarm situations in case of extreme pollution before the drinkable water is delivered to end users.