ANALYST, JULY 1993, VOL. 118 9SN Future Issues will Include- Dynamic Model of an Optical Absorption-based pH Sensor- Yordan Kostov, Ljubov Yotova and Stoyan Tzonkov Under-determination of Strontium-90 in Soils Containing Particles of Irradiated Uranium Oxide Fuel-Deborah H. Oughton, Brit Salbu, Tom L. Brand, J. Philip Day and Asker Aarkrog Titrations of Non-ionic Surfactants With Sodium Tetraphenyl- borate Using the Orion Surfactant Electrode-Robyn Dahl Gallegos Determination of Citric Acid and Oxalacetic Acid in Foods by Enzymic Flow Injection-Milagros Planta, Fernando Lazaro, Rosa Puchades and Angel Maquieira Relationship Between Geochemical Reference Material Characterization and the Development of New Methods for Geoanalysis-Jean S. Kane Determination of Derivatized Urea Herbicides in Water by Gas Chromatography With a Nitrogen-Phosphorus Detector- Steven Scott Decomposition of Biological Samples €or Inductively Coupled Plasma Atomic Emission Spectrometry Using an Open Focused Microwave Digestion System-Antoaneta Krushev- ska, Ramon M.Barnes and Chitra Amarasiriwaradena Simultaneous Determination of Catalysts Through a Single Catalytic Kinetic Run-Zhi-Cheng Gu, Zhong-Liang Zhu, Rong-Mei Chen, Bing-Liang Lu and Chuan-Qiang Han Speciation of Mercury in Natural Waters by Capillary Gas Chromatography With a Microwave-induced Plasma Emis- sion Detector Following Preconcentration Using a Dithiocar- bamate Resin Microcolumn Installed in a Closed Flow Injection System-HHkan Emteborg, Douglas C. Baxter and Wolfgang Frech Investigation and Elimination of Sodium Nitrate-Borate Interference on Manganese in Electrothermal Atomic Absorption Spectrometry-Yukihiro Koshino and Akira Narukawa Frequency Characteristics of an Electrode-separated Piezo- electric Crystal Sensor in Contact With a Liquid-Yao Shouzhou, Nie Lihua, Kang Qi, Lin Song and Shen Dazhong Determination of Phenol in Wastes and Water Using an Enzyme Sensor-L.Campanella, T. Beone, M. P. Sammartino and M. Tomassetti Simultaneous Determination of Anions and Divalent Cations Using Ion Chromatography and Eth ylenediamine te traace tic Acid Eluent-Christopher A. A. leGras Separation of Atomic Vapours by Sequential Metal Vapour Elution Analysis-Kiyohisa Ohta, Nobuhiro Yamanaka, Syn-Ya Inui, James D. Winefordner and Takayuki Mizuno Enzymic Assays of Organic Peroxides in Microemulsion Systems-Joseph Wang and A.Julio Reviejo Determination of Trace Amounts of Thallium and Tellurium in Nickel-base Alloys by Electrothermal Atomic Absorption Spectrometry-Suh- Jen Jane Tsai and Ching-Ching Jan Application of Poly(ani1ine) as an Ion Exchanger for the Separation of Palladium, Iridium, Platinum and Gold Prior to Their Determination by Neutron Activation Analysis-S. Gangadharan, Sanjiv Kumar and Rakesh Verma Spectrophotometric Determination of Lipohydroperoxides and Organic Hydroperoxides by Use of the Triiodide- Hexadecylpyridinium Chloride Micellar System-Dolores Pkrez-Bendito, Soledad Rubio and Ma Loreto Lunar Solid-phase Spectrophotometric Determination of Niobium in Rocks After Coprecipitation With Iron Quinolin-8-olate- Isoshi Nukatsuka, Toshihide Munakata, Kunio Ohzeki and Ryoei Ishida Modification of an Ultraviolet Spectrophotometric Method for the Determination of Trace Amounts of Phenols With Iodine Monobromide-Peixun Zhang and David Littlejohn Inverted Poly(viny1 chloride)-Liquid Membrane Ion-selective Electrodes for High-speed Batch Injection Potentiometric Analysis-Dermot Diamond, Joseph Wang, Qiang Chen and Jianmin LuEIRELEC 1993 Electrochemistry to the year 2000 September 11-15 Adare, Co.Limerick, Ireland Scientific Programme An international conference dealing with recent advances in electrochemical methodology, technology and sensors will be held at the Dun Raven Arms Hotel, Adare, Co. Limerick, Ireland. The programme will consist of plenary, invited and contributed oral papers and posters, and will be organized to allow for maximum discussion of papers.Plenary lectures will be given by: Professor A. Bard (USA) Professor J.O.M. Bockris (USA) Professor J. Wang (USA) A strong programme of invited and contributed lectures is currently being organized. Location Adare is a small, picturesque, historical village located just a short drive from Shannon International Airport (approx. 35 min). The village has been chosen because of the large range of activities it can provide, both cultural and sporting, and ample opportunity will be given to savour the local environment. The conference will be based in the "Olde Worlde" atmosphere of the Dun Raven Arms Hotel; a large range of accommodation is available within and close to Adare, ranging from the world renowned Adare Manor to pleasant bed and breakfast type lodgings. An option has been taken on several family holiday cottages within the town and these will be available to those delegates wishing to be accompanied by their families. Publication We have planned to publish a Special Issue of The Analyst based on the papers and posters that will be presented at this conference, and authors of invited and contributed papers will be encouraged to submit their papers to Professor M.R. Smyth at the address given below before, or at, the meeting. Those wishing to submit abstracts (1 page A4) or to obtain further details of the meeting should contact Professor Sm yth. The second circular for this meeting will be available in April 1993 and will contain full details of registration fees, accommodation, etc. Contact Address : Professor M.R. Smyth, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland. Tel: +353-1-7045308; Fax: +353-1-7045503