iv SUMMARIES OF PAPERS I N THIS ISSUE [March, 1966Summaries of Papers in this IssueThe Analysis for Residues of Chlorinated Insecticidesand AcaricidesA ReviewSUMMARY OF CONTENTSIntroductionSampling and storageExtraction proceduresSoilsCropsWaterAnimal tissues and productsColumn chromatographyPaper chromtographyThin-layer chromatographyLiquid - liquid partitionPrecipitation of fats and waxesChemical methodsOther miscellaneous methodsGas - liquid chromatographyTotal halide analysisPolarograph yBioassayColorimetric and ultravioletanalysisInfrared analysisFluorimetryClean-up proceduresQuantitative analysisK. I. BEYNON and K. E. ELGARPaper chromatographyThin-layer chromatographyThe positive identification ofpesticide residuesRecommended methodsGeneral proceduresIndividual procedures(i) Aldrin(ii) BHC(iii) Chlorbenside (Mitox)(iv) Chlordane(v) Chlorfenson (Oves)(vi) Chlorobenzilate(vii) DDT, TDE and DDE(viii) Dicofol (Kelthane)(ix) Dieldrin(x) Endosulfan (Thiodan)(xi) Endrin(xii) Heptachlor and its(xiii) Methoxychlor(xiv) Oxythane (Neotran)(xv) Tetradifon (Tedion)(svi) Toxspheneepoxide“Shell” Research Limited, Woodstock Agricultural Research Centre, Sittingbourne,Kent.Analyst, 1966, 91, 143-175.REPRINTS of this Review paper will soon be available from the Secretary, The Societyfor Analytical Chemistry, 14 Belgrave Square, London, S.W.l, a t 5s.per copy, post free.A remittance for the correct amount, made out t o The Society for AnalyticalChemistry, MUST accompany every order; these reprints are not available through TradeAgents.Spectrophotometric Determination of 0.01 to 0.1 per cent.ofAntimony in LeadThe development of a spectrophotometric method for the determinationof small amounts (0.001 to 0.1 per cent.) of antimony in lead is described.The proposed method is based on the extraction of antimony from hydro-chloric acid solution with di-isopropyl ether, followed by spectrophotometricdetermination with the iodide procedure. The presence of other impurityelements usually found in lead causes no significant interference.J. BASSETT and J. C. H. JONESChemistry Department, Woolwich Polytechnic, London, S.E. 18.A ~ , d y s t , 1966, 91, 176-179March, 19661 THE ANALYST VMATERIALS FORELECTROPHORESISWHEREHOWcan I find a comprehensive list of materialsfor any aspect of electrophoresis?A BDH leaflet, 'Materials for Electrophoresis',describes gel media, chemicals forpreparing buffer solutions, stains and indicators,solvents and miscellaneous reagents.are the various methods of zone electrophoresiscarried out?Detailed descriptions illustrated by plates andline drawings are given in a new BDH publication,'Methods in Zone Electrophoresis', by Dr.J. R.Sargent. This immensely practical book dealswith general theory, apparatus, high and lowvoltage electrophoresis, electrophoresis onvarious media, immunoelectrophoresis, etc.Sargent, J. R., 'Methods in Zone Electrophoresis',a BDH publication, 1965, ~ v o ., 107 pp., 8s 6dpost freeThe leaflet on 'Materials for Electrophoresis'may be obtained free from Poole on request.THE BRITISH DRUG HOUSES LTDBDH Laboratory Chemicals DivisionPOOLE DORSETELI vi SUMMARIES OF PAPERS I N T H I S ISSUEThe Use of Lithium-drifted Germanium Diodes for they-Spectrometric Determination of RadioactiveFission-product Nuclides[March, 1966The superiority of a y-spectrometer incorporating a germanium - lithiumdiode detector and field-effect transistor head amplifier over the conventionalsodium iodide - thallium system, for the resolution of most of the difficultdeterminations encountered in fission-product ratliochemistry, is demonstrated.M. F. BANHAM, A. J. FUDGE and J. H. HOWESChemistry and Electronics Divisions, U.I<. Atomic Encrgy Research Establishment,Harwcll, Didcot, Berks.Analyst, 1966, 91, 180-185.Determination of Catechol in Cigarette SmokeA procedure has been devised for the specific determination of catecholin cigarette-smoke condensates. This procedure should also be applicableto the determination of catechol in other materials resulting from pyrolyticor combustion processes.As the catechol is isolated without recourse to the formation of a deriva-tive, no interference is encountered as a result of the presence of guaiacolor similar compounds. Avoidance of the use of alkaline conditions throughoutthe procedure has permitted reproducible and high recoveries.J. D. MOLD, M. P. PEYTON, R. E. MEANS and T.B. WALKERResearch Department, Liggett and Myers Tobacco Company, Durham, NorthCarolina, U.S.A.Analyst, 1966, 91, 189-194.Determination of Zinc in Trace- element Superphosphateby A.C. PolarographyZinc has been effectively determined in “trace-element superphosphate”with an a.c. polarographic technique. This technique is both rapid andaccurate and compares favourably with the atomic-absorption method. Thezinc is maintained in solution by polarographing in an acid electrolyte ofM hydrochloric acid a t a pH of less than 1. The method eliminates the time-consuming process of separation from interfering ions.The presence of the hydrogen reduction wave does not materiallyinterfere with the zinc reduction wave as happens in conventional d.c.polarography .G.CURTHOYS and J. R. SIMPSONNewcastle University College, The University of New South Wales, Australia.Analyst, 1966, 91, 195-198.Simultaneous Determination of Iodine and Bromine in Urineby Neutron- activation AnalysisNeutron-activation analysis was used for the simultaneous determinationof iodine and bromine in urine. The activated iodine and bromine wereseparated by radiochemical methods. The 0.46 MeV and 0.55 MeV peakareas of 1281 and 82Rr, respectively, were measured by means of a multi-channel analyser. The amounts of iodine and bromine were found to beof the order of lo-’ and g ml-l of urine, respectively, for normal humanbeings of different ages.E. P. BELKAS and A. G. SOULIOTISChemistry Department, Nuclear Research Centre “Democritus,” Athens, Greece.Analyst, 1966, 91, 199-204...Vlll SUMMARIES OF PAPERS I N THIS ISSUEMicro Determination of Inorganic Phosphorus in Plasma[March, 1966Short PaperB.B. BAUMINGER and G. WALTERSChemical Pathology Department, New Cross Hospital, Wolverhampton.Analyst, 1966, 91, 205-206.An Improved Iodine Determination Flask for Whole-bottleTitrationsShort PapevE. J. GREEN and D. E. CARRITTDepartment of Geology and Geophysics, Massachusetts Institute of Technology,Cambridge, Massachusetts, U.S.A.Analyst, 1966, 91 , 207-208.An Automatic Determination of Thoria in Thoria - UraniaMixturesShovt PaperW. A. STUARTU. K. Atomic Energy Research Establishment, Hsrwell, Didcot, Berks.Analyst, 1966, 91, 208-210.A Rapid Method for Determining the Moisture Content ofGelatin and Animal GlueShort PaperR. T. JONESThe Gelatine and Glue Research Association, Warwick Street, Birmingham 12.Analyst, 1966, 91, 210-212.A Simplified Method for Determining Copper CompoundsPresent on Leaf SamplesShort PaperR. B. SHARPInstrumentation Department, Kational Institute of Agricultural Engineering,Wrest Park, Silsoe, Bedfordshire.Analyst, 1966, 91, 212-213.Spectral Characteristics of EugenolReport prepared by the Essential Oils Sub-committeeANALYTICAL METHODS COMMITTEE14 Belgrave Square, London, S.W.1.Analyst, 1966, 91, 214-215