Table Of Content

ANALYTICA 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) m VOL. 340 NO. 1-3 CONTENTS MARCH 20,1997 Letter Xenon tetrafluoride as a decomposition agent for silicone rubber for isolation and atomic emission spectrometric determination of trace metals V.I. Rigin (Krasnoyarsk, Russia), N.K. Skvortsov and VV. Rigin (St. Petersburg, Russia) Mass Spectrometry A study of the applicability of various ionization methods and tandem mass spectrometry in the analyses of triphenyltin compounds C.J.H. Miermans (Lelystad, The Netherlands), R.H. Fokkens and N.M.M. Nibbering (AmsterdamT,h e Netherlands) Determination of the carbon-13 content of sugars and pulp from fruit juices by isotope-ratio mass spectrometry (internal reference method). A European interlaboratory comparison A. Rossmann (Freising-Weihenstephan, Germany), J. Koziet (Creteil, France), G.J. Martin (Nantes, France) and M.J. Dennis (Colney, Norway) Preconcentration and matrix separation of precious metals in geological and related materials using metalfix-chelamine resin prior to inductively coupled plasma mass spectrometry A.G. Coedo, MT. Dorado, |. Padilla and F. Alguacil (Madrid, Spain) Electroanalytical Chemistry and Sensors Development of a chemical vapor sensor using piezoelectric quartz crystals with coated unusual lipids K. Yano, H. Yoshitake (Tokyo, Japan), U.T. Bornscheuer, R.D. Schmid (Stuttgart, Germany), K. Ikebukuro, K. Yokoyama, Y. Masuda and |. Karube (Tokyo, Japan) Detection of lipopolysaccharide binding peptides by the use of a lipopolysaccharide-coated piezoelectric crystal biosensor H.-C. Chang, C.-C. Yang and T.-M. Yeh (Tainan, Taiwan) Oscillation condition for a series piezoelectric sensor. Application to the determination of urease activity in plant seeds D. Shen, Q. Kang, Z. Liu and L. Wang (Jinan, China) Factors affecting the analytical applications of zeolite-modified electrodes Preconcentration of electroactive species A.Walcarius,T .B arbaise and J. Bessiere (Villers-les-Nancy, France) Anodic characterization of mercury microelectrodes for determinations of anions in real samples M.A. Baldo, S. Daniele and G.A. Mazzocchin (Venice, Italy) Amperometric selective biosensing of dimethyl- and diethyldithiocarbamates based on inhibition processes in a medium of reversed micelles M.TP Pita, A.J. Reviejo, F.J. Manuel de Villena and J.M. Pingarron (Madrid, Spain) Effect of surface activation on charge and mass transfer rates of the hexacyanoferrate(Ill)/(Il) redox probe at fibrinogen-modified carbon paste electrodes LA. Arkoub, H. Randriamahazaka and J.-M. Nigretto (Cergy-Pontoise, France) Glucose oxidase/hexokinase electrode for the determination of ATP D. Compagnone and G.G. Guilbault (Cork, Ireland) (Continued overleaf) Spline wavelet analysis for voltammetric signals X. Zou and J. Mo (Guangzhou, China) Simultaneous monitoring of pH, CO2 and O, using an optical imaging fiber JA. Ferguson, BG. Healey, K.S. Bronk, S.M. Barnard and D.R. Walt (Medford, MA, USA) lonic equilibria in aqueous organic solvent mixtures The dissociation constants of acids and salts in tetrahydrofuran/water mixtures U. Muinasmaa, C. Rafols, E. Bosch and M. Rosés (Barcelona, Spain) Reusable ethanol sensor based on a NAD* -dependent dehydrogenase without coenzyme addition B. Leca and J.-L. Marty (Perpignan, France) Flow Analysis Simultaneous flow injection analysis of cadmium and lead with differential pulse voltammetric detection J. Alpizar (Havana, Cuba), A. Cladera,V .C erda (Mallorca, Spain), E. Lastres, L. Garcia and M. Catasus (Havana, Cuba) Comparative study of some synthesised and commercial fluorogenic substrates for horseradish peroxidase and its mimetic enzyme hemin by a flow injection method Y.-Z. Li and A. Townshend (Hull, UK) Flow injection analysis of copper diethyldithiocarbamate in high resistance toluene media using a microelectrode detector T.J. Cardwell, JH. Santos (Bundoora, Vic., Australia) and A.M. Bond (Clayton, Vic. ,A ustralia) Development of an amperometric immunosensor based on flow injection analysis for the detection of red blood cells B. Lu, M.R. Smyth, R. O’Kennedy (Dublin, ireland), J. Moulds and T. Frame (Houston, TX, USA) Chromatography Elemental! composition determination of organophosphorus compounds using gas chromatography and atomic emission spectrometric detection G. Becker and A. Colmsjé and C. Ostman (Solna, Sweden) Determination of phenols in water by on-line solid-phase disk extraction and liquid chromatography with electrochemical detection O. Jauregui and MT. Galceran (Barcelona, Spain) Detection and identification of thyreostats in the thyroid gland by gas chromatography-mass spectrometry BLL. Bizec, F. Monteau, D. Maume, M.-P. Montrade, C. Gade and F. Andre (Nantes, France) Stability studies of arsenate, monomethylarsonate, dimethylarsinate, arsenobetaine and arsenocholine in deionized water, urine and clean-up dry residue from urine samples and determination by liquid chromatography with microwave-assisted oxidation-hydride generation atomic absorption spectrometric detection M.A. Palacios, M. Gomez, C. Camara and M.A. Lopez (Madrid, Spain) Extraction of lithiurn from GSJ rock reference samples and determination of their lithium isotopic compositions T. Oi,T .O dagiri and M. Nomura (Tokyo, Japan) IR+Raman Spectroscopy Monitoring the absorption of organic vapors to a solid phase extraction medium Applications to detection of trace volatile organic compounds by integration of solid phase absorbents with fiber optic Raman spectroscopy K.J. Ewing, G. Nau,T .B ilodeau, D.M. Dagenais, F. Bucholtz and |.D. Aggarwal (Washington, DC, USA) The prediction of coal properties using compressed inf-ared data from osculating polynomials CE. Alciaturi, T.M ontero, C.D.L. Cruz and ME. Escobar (Maracaibo, Venezuela) Spectrophotometry Simple spectrophotometric determination of tinidazole in formulation and serum L. Lopez-Martinez, F.J.L. Vazquez and PL. Lopez-de-Alba (Guanajuato, Mexico) Intrinsic and 1-aminonaphthalene-4-sulfonate-specific extrinsic lyoluminescences of X-ray irradiated sodium chloride S. Kulmala, A. Kulmaia,T .A la-Kleme, A. Hakanen and K. Haapakka (Turku, Finland) Simultaneous spectrophotometric determination of ethinylestradiol and levonorgestrel by partial least squares and principal component regression multivariate calibration J.J.B. Nevado, J.R. Flores and G.C. Pefialvo (Ciudad Real, Spain) Chemometrics Acomputer program for searching the best model for describing different experimental systems S. Bohanec and M. Moder (Ljubljana, Slovenia) (Continued overleaf) Atomic Absorption Spectrometry Determination of physiological noble metals in human urine using liquid-liquid extraction and Zeeman electrothermal atomic absorption spectrometry J. Begerow, M. Turfeld and L. Dunemann (Dusseldorf, Germany) Pyrocatechol Violet immobilized Amberlite XAD-2: synthesis and metal-ion uptake properties suitable for analytical applications R. Saxena and A.K. Singh (New Delhi, india) Fluorimetry Determination of DNA using sodium 910-anthraquinone-2-sulfonate as an in situ photochemical fluorescence probe W.-Y. Li, X.-Q. Guo, J.-G. Xu, Q.-Z. Zhu and Y.-B. Zhao (Xiamen, China) Author index