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ANALY TICA CHIMICA ACTA An international journal devoted to all branches of analytical chemistry (Full texts are incorporated in CJELSEVIER, a file in the Chemical Journals Online database available on STN International; Abstracted, indexed in: Aluminium Abstracts; Anal. Abstr.; Biol. Abstr.; BIOSIS; Chem. Abstr.; Curr. Contents Phys. Chem. Earth Sci.; Engineered Materials Abstracts; Excerpta Medica; Index Med.; Life Sci; Mass Spectrum. Bull.; Material Business Alerts; Metals Abstracts; Sci. Citation Index) VOL. 402 NOS. 1-2 CONTENTS December 3, 1999 Urgent Letter Evaporative light scattering detector: a new tool for screening purposes S. Cardenas, M. Gallego and M.V alcarcel (Cordoba, Spain) Determination of Nucleic acids New label-free DNA recognition based on doping nucleic-acid probes within conducting polymer films J. Wang, M. Jiang, A. Fortes and B. Mukherjee (Las Cruces, NM, USA) Flow-injection chemiluminescence determination of DNA based on a photochemical reaction T. Péerez-Ruiz, C. Martinez-Lozano, V. Tomas and J. Martin (Murcia, Spain) Utilization of the copper (Il)c omplex with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol as an absorption spectroscopic probe for nucleic acids assay Y.-M. Hao, Z.-X. Guo, X.-X. Wang and H.-X. Shen (Tianjin, PR China) immunoassays and enzymatic methods 4-Hydroxynaphthyl-1-phosphate as a substrate for alkaline phosphatase and its use in sandwich immunoassay M. Masson,T .H aruyama, E. Kobatake and M. Aizawa (Yokohama, Japan) Monoclonal antibody capture fluorometric enzyme linked immunosorbent assay for detection of porcine growth hormone in plasma C. Secchi, A. Berrini, D. Gaggioli, F. Acocella (Milan, Italy), J. Beattie (Scotland, UK) and V. Borromeo (Milan, Italy) Microplate-based fluorometric methods for the enzymatic determination of L-glutamate: application in measuring L-glutamate in food samples J. Chapman and M. Zhou (Eugene, OR, USA) Capillary electrophoresis Capillary electrophoretic separation of positional isomers of hydroxynaphthalenecarboxylic acids through the formation of inclusion complexes with 3-cyclodextrin S. Hamai and H. Sakurai (Akita, Japan) 53 Tricine buffer for metallothionein isoform separation by capillary zone electrophoresis V. Virtanen and G. Bordin (Geel, Belgium) 59 (Continued overleaf) & http://ChemWeb.com The World Wide Ciub for the Chemical Community http://chemweb.com/gateways/elseviehrt.m l CO N T E NTS This journal is part of ContentsDirect, the free alerting service which sends tables of contents by e-mail for Elsevier Science books and journals. You can register for @ ContentsDirect online at: www.elsevier.ni/locate/contentsdirect Liquid chromatography Development of new SPME fibers by sol—gel technology for SPME-HPLC determination of organometals TP. Gbatu, K.L. Sutton and J.A. Caruso (Cincinnati, OH, USA) Determination of phenolic antioxidants in vegetal and animal fats without previous extraction by dilution with n-propanol and micellar liquid chromatography J.F. Noguera-Orti, R.M. Villanueva-Camanas and G. Ramis-Ramos (Burjassot, Spain) Liquid chromatography and exchange reaction of a synthetic thiurams mixture C. Mathieu (Orléans, France and Chalette sur Loing, France), B. Herbreteau, M. Lafosse (Orleans, France), M. Renaud (Liancourt, France), C. Cardinet (Chalette sur Loing, France) and M. Dreux (Orléans, France) Preconcentration Phosphonate-based resins for the selective enrichment of uranium(VI) M. Merdivan (Balikesir, Turkey), M.R. Buchmeiser and G. Bonn (Innsbruck, Austria) Chemiluminescence Facile chemiluminescent method for alkaline phosphatase determination V.F. Ximenes, A. Campa, W.J. Baader and L.H. Catalani (Sao Paulo, Brazil) Measurement of fatty amine ethoxylate surfactants using electrochemiluminescence C.J. Alexander and M.M. Richter (Springfield, MO, USA) Pulse injection analysis with chemiluminescence detection: determination of cinnamic acid using the Ru(bipy)3°*-KMnO, system H.-Y. Han, Z.-K. He and Y.-E. Zeng (Wuhan, PR China) Sensors and electroanalytical chemistry Competitive enzyme immunosensor developed on a renewable carbon paste electrode support C. Fernandez-Sanchez and A. Costa-Garcia (Asturias, Spain) PVC membranes based on silver(l)—thiourea complexes F.Z. El Aamrani (Barcelona, Spain), J. Garcia-Raurich (Terrassa, Spain), A. Sastre (Barcelona, Spain), L. Beyer (Leipzig, Germany) and A. Florido (Barcelona, Spain) Thiocyanate-selective electrodes based on nickel and iron phthalocyanines M.K. Amini, S. Shahrokhian and S. Tangestaninejad (Esfahan, Iran) Electrocatalytic detection of biological nitric oxide at an ultramicroelectrode modified with an electrodeposited CuPtCl, film J. Pei (Geneva, Switzerland), N.-T. Yu and X.-Y. Li (Hong Kong, China) Electrochemical study of electroactive reagent retention in overoxidised polypyrrole films DW.M. Arrigan and DS. Gray (Salford, UK) Fulvic acids Simultaneous determination of Ca, Cu, Ni, Zn and Cd binding strengths with fulvic acid fractions by Schubert's method G.K. Brown (Boulder, CO, USA), RPM acCarthy (Golden, CO, USA) and J.A. Leenheer (Arvada, CO, USA) Cu(II) binding by a pH-fractionated fulvic acid G.K. Brown (Arvada, CO, USA and Golden, CO, USA), S.E. Cabaniss (Kent, OH, USA), P MacCarthy (Golden, CO, USA) and J.A. Leenheer (Arvada, CO, USA) Competitive ligand exchange/adsorptive cathodic stripping voltammetry (CLE/AdCSV) for kinetic studies of nickel speciation in aqueous environmental samples containing heterogeneous, macromolecular, organic complexants M.T. Lam, J. Murimboh, N.M. Hassan and C.L. Chakrabarti (Ottawa, Canada) Effect of metal/fulvic acid mole ratios on the binding of Ni(II), Pb(Il), Cu(il), Cd(Il), and Al(Ill) by two well-characterized fulvic acids in aqueous model solutions A.L.R. Sekaly, R. Mandal, N.M. Hassan, J. Murimboh, C.L. Chakrabarti, M.H. Back, D.C. Grégoire (Ottawa, Canada) and WH. Schroeder (Downsview, Canada) Environmental and food analysis Stability of dissolved metals in environmental aqueous samples: Rideau River surface water, rain and snow A.L.R. Sekaly, C.L. Chakrabarti, M.H. Back, D.C. Gregoire (Ottawa, Canada), JY. Lu and WH. Schroeder (Downsview, Canada) Anew method for determining the concentration of atmospheric alcohols using the nitrite formation reaction H.T.-H. Nguyen,Y . Fujio, N. Takenaka, H. Bandow and Y. Maeda (Osaka, Japan) Levels of polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins and dibenzofurans in commercial yoghurt samples in Spain. Comparison with different dairy products L. Ramos (Madrid, Spain), E. Eljarrat (Barcelona, Spain), L.M. Hernandez (Madrid, Spain), J. Rivera (Barcelona, Spain) and M.J. Gonzalez (Madrid, Spain) 4-Methoxy-azomethine-H as a reagent for the spectrophotometric determination of boron in plants and soils L. Zaijun, Z. Zhu,T .J an (Wuxi, China), C.-G. Hsu and P. Jiaomai (Shanghai, China) Flow injection analysis Direct, selective flow injection spectrophotometric determination of calcium in wines using methylthymol blue and an on-line cascade dilution system D.G. Themelis, PD. Tzanavaras, A.N. Anthemidis and J.A. Stratis (Thessaloniki, Greece) Radioluminescence detector for the flow injection determination of phosphorus as vanadomolybdophosphoric acid A.M. Leach, D.L. Burden and G.M. Hieftje (Bloomington, IN, USA) Chemometrics Application of natural computation techniques to optimal design of flow injection systems J. de Gracia (Girona, Spain), A. Araujo, J.L.F.C. Lima (Porto, Portugal), |.V illaescusa and M. Poch (Girona, Spain) Factor analysis applied to the study of retention mechanism of nitroanilines in normal phase high performance liquid chromatography L. Giacomelli, H. Boggetti, H. Agnelli, R. Cattana and J.J. Silber (Rio Cuarto, Argentina) Infrared spectrophotometry Determination of oxygen-to-metal atomic ratio in mixed oxide fuel by non-dispersive infrared spectrophotometry after fusion in an inert gas atmosphere T. Hiyama (Ibaraki-ken, Japan) Mass spectrometry Structure identification of synthetic human galanin using tandem mass spectrometry and in situ fast atom bombardment mapping M. Mak and L. Balaspiri (Budapest, Hungary) Studies of the major degradation products of a higher alkyl polyacrylate using pyrolysis gas chromatography—mass spectrometry J. Li, H. Xu, J. Shi, C. Liand C. Bao (Langfang, China) Atomic spectrometry Continuous tandem on-line separation inductively coupled plasma optical emission spectrometry selective determination of germanium in zinc electrolytic solutions J.C. Florez Menéndez, A. Menéndez Garcia, J.E. Sanchez Uria and A. Sanz-Medel (Oviedo, Spain) Interference of various salts on the determination of selenium by graphite furnace atomic absorption spectrometry: effect of sea water JY. Cabon and A. Le Bihan (Brest, France) Acid-base equilibria Protolytic equilibria of dinydroxyanthraquinones in non-aqueous solutions A. Bogdanhska, L. Chmurzynski, T.O ssowski, A. Liwo (Gdansk, Poland) and D. Jeziorek (Torun, Poland) Author Index