22 XOTICES :Proc. SOC. ilnalyt. Chenz. Notices INTERNATIONAL SYMPOSIUM ON LIQUID SCINTILLATIOX COUNTING SEPTEMBER 3RD TO 6TH 1973 BRIGHTON THIS Symposium organised by the Radiochemical Methods Group of the SAC/Analytical Division will be held a t the Hotel Metropole Brighton. The principal themes will be Nodern Concepts of Liquid Scintillation Counting Sample Preparation and Quench Correction Techniques. Opportunity will be given for the presentation of short papers on these topics. Plenary lectures will be given by internationally known authorities including Dr. E. Mueller (nke Bush) Dr. B. E. Gordon Dr. V. Tarkkanen and Dr. R. Parker. The meeting will begin with a “teach-in” for those new to the technique of liquid scintillation counting. An extensive exhibition of liquid scintillation counters and related equipment has been arranged and the following firms will be exhibiting Beckman Berthold/Frieseke Inter- technique E.M.I.Ltd. LKB-Wallac Kuclear Chicago Yuclear Enterprises Packard Pye Unicam Tracerlab Fisons and Koch-Light. Papers which must be submitted to the Papers Committee should describe original unpublished work with particular reference to the main subject divisions. Intending contributors should send three copies of an abstract (about 500 words in English) by April lst 1973 to Mr. M. 4 . Crook Radiochemical Methods Group Society for Analytical Chemistry 9/10 Savile Row London W X 1AF. If you wish to be kept informed of arrangements and t o receive application forms when available please write to Miss P. E. Hutchinson Society for Analytical Chemistry 9/10 Savile Row London WlX 1AF.Lectures will be given by Dr. A. Dyer and Dr. E. Rapkin. DETECTORS FOR MEASUREMENT OF WATER POLLUTION JANUARY %RD 1973 LONDOX THE Electronics Division of The Institute of Electrical Engineers is organising this Colloquium which includes the applications of gas permeable and selective ion electrodes novel sensors recent developments in sensors and systems submersible monitors and on-line determination of ammonia with a membrane electrode. Further details can be obtained from the Secretary Institution of Electrical Engineers Savoy Place London WC2R OBL. SEVENTH INTERNATIOXAL CONFERENCE OS IS’ATER POLLUTION RESEARCH SEPTEMBER ~ T H TO 1 3 ~ ~ 1974 PARIS COMPLETED papers on all aspects of water pollution research in the freshwater and marine environment are invited before November 7th 1973 for the above Conference. Details concerning the subjects of interest and the form of submission of papers can be obtained from Dr. S. H. Jenkins Upper Tame Main Drainage Authority 156/170 Newhall Street Birmingham B3 1SE.