Reference

Acetonitrile as Adsorbate or Solvent to Probe the Crystal Face Specificity of Metal-Water Interaction at Silver Electrode/Solution Interfaces

Acetonitrile as Adsorbate or Solvent to Probe the Crystal Face Specificity of Metal-Water Interaction at Silver Electrode/Solution Interfaces. Doubova, L. M.; Daolio, S.; Pagura, C.; De Battisti, A.; Trasatti, S. ( IENI-CNR, Padua 35127, Italy). Russian Journal of Electrochemistry (Translation of Elektrokhimiya), 39(2), 164-169 (English) 2003 MAIK Nauka/Interperiodica Publishing. CODEN: RJELE3. ISSN: 1023-1935. DOCUMENT TYPE: Journal CA Section: 72 (Electrochemistry) Section cross-reference(s): 56, 66 The crystal face specificity of metal-water interaction at Ag electrode/soln. interfaces is investigated by using acetonitrile (ACN) as a probe mol. of the water interfacial structure or as a solvent in which water is a solute. Capacitance and voltammetric curves suggest that ACN is weakly adsorbed from aq. soln. on Ag in the order (111) > (100) > (110). Apparent inconsistencies of adsorption parameters are explained by the occurrence of two ACN adsorption modes: (i) directly on the metal surface and (ii) on the water layer adsorbed on the metal surface. Ag surface oxidn. in ACN in the presence of variable amts. of water suggests that water has an inhibiting effect on Ag oxidn., the diminution of the water content in ACN leading to free anodic dissoln. of the metal surface.

Multi-residue analysis of plant protectives and metabolites in water with HPLC and diode-array detection

Multi-residue analysis of plant protectives and metabolites in water with HPLC and diode-array detection. Kicinski, H. G. (Angew. Chem., Univ.-Gesamthochsch. Paderborn, Paderborn, Germany). CLB Chem. Labor Biotech., 42(9), 487-8, 491-3 (German) 1991. CODEN: CCLBEW. DOCUMENT TYPE: Journal CA Section: 61 (Water) Section cross-reference(s): 5, 80 The detn. of herbicides and pesticides (triazines) in complex aq. matrixes by solid-phase extn. and subsequent HPLC with diode-array detection is described. Reversed-phase C18 adsorbents were applied for solid-phase extn. and the herbicides were eluated with MeOH. Bakerbond-Wide-Pore-C18 materials were used as stationary phase in HPLC. Acetonitrile and MeCO2NH4 buffer (pH 7) were used as mobile phases.