x SUMMARIES OF PAPERS I N THIS ISSUEHigh-performance Liquid Chromatographic Determination ofAcrylic Acid Monomer in Natural and Polluted AqueousEnvironments and PolyacrylatesA procedure is described for the determination of acrylic acid monomer innatural and polluted waters and poly acrylates. Polyacrylates are extractedusing a mixture of methanol and water prior to analysis, but no preparationis required for water samples. Separation from interferences is achieved byhigh-performance liquid chromatography and quantification by ultravioletdetection. A detection limit of 0.05 mg 1-1 and a precision of 8% a t 1.17and 10 mg 1-1 of acrylic acid have been achieved using water samples. Samplestested included river, sea and estuarine waters, sewage and china clay workseffluents and potable waters.Acrylic acid can be detected a t levels in excessof 0.0005~0 of monomer in the polymer with a precision of 8% a t levels of0.05% and 0.003% of monomer.Keywords : A cvylic acid detevvvlination ; aqueous solutions ; polyacvylates ;December, 1979high-pevformance liquid clzromatogvaplay ; environmental pollutionL. BROWNSchool of Environmental Sciences, Plymouth Polytechnic, Drake Circus, Plymouth,Devon, PL4 8AA.Analyst, 1979, 104, 1165-1170.Determination of Ochratoxin A in Pig's Kidney Using EnzymicDigestion, Dialysis and High-performance LiquidChromatography with Post-column DerivatisationA method for the determination of ochratoxin A in pig's kidneys is described.The detection limit is less than 1 p g k:g-l.By using enzymic digestion con-currently with dialysis and by controlling the pH conditions, the sample isextracted and interfering co-extracts removed without the use of columnchromatography. The final determination employs reversed-phase high-performance liquid chromatography wj t h either a phthalimidopropylsilane ora C,, (docosyl) bonded column, and the sensitivity of the fluorescence detectoris increased ten-fold by the formation of a post-column derivative withammonia solution.Keywords ; Ochvatoxin A ; high-pevfownance liquid chromatograplzy ; enzymes ;dialysisD. C. HUNT, LESLEY A. PHILP and N. T. CROSBYLaboratory of the Government Chemist, Cornwall House, Stamford Street, London,SE1 9NQ.Analyst, 1979, 104, 1171-1175.Preparation and Stability of Dilute Insecticide AnalyticalStandards for Gas; ChromatographyA convenient and economical procedure for preparing and storing accuratelymeasured amounts (1.00 mg) of insecticide analytical standards is described.The validity of the method was evaluated in a 2-year study of the storagestability of carbofuran, chlorfenvinphos, diazinon, dichlorvos, disulfoton anddisulfoton sulphone.Solutions (1 mg m-l) of each insecticide were preparedin hexane, toluene or acetone and aliquots sealed in glass ampoules were storeda t -20, 1 and 20 "C. After 0.25, 0.5, 1.0 and 2.0 years the mean concentra-tions of all compounds, except dichlorvos, were within 0.976 of fresh solutionsof the original standards; dichlovos was 3.6% greater.Neither the type ofsolvent nor the storage temperature had significant (P = 0.05) effects on theconcentrations but there were large differences in purity between differentbatches of primary standards of all the organophosphorus insecticides.Keywords : Insecticide analytical staizdards ; insecticide residues ; chromato-P P h YD. L. SUETT, G. A. WHEhTLEY and (C. E. PADBURYNational Vegetable Research Station, Wellesbourne, Warwick, CV35 9EF.Analyst, 1979, 104, 1176-1180xii SUMMARIES OF PAF'ERS I N THIS ISSUEAssay of Nicotinamide in Multivitamin Preparations Using anAmmonia Gas- sensing ElectrodeDecembev, 1979A simple potentiometric method for the determination of nicotinamide isdescribed. The sample is subjected to alkaline hydrolysis and the ammoniathus produced is determined with an ammonia gas-sensing electrode.Amounts of nicotinamide in the range 0.5-15 mg have been determined withan average error of about 1.7 % .The method has been applied to the analysisof multivitamin preparations. The analytical recovery of nicotinamide was95-107%. Comparison with an official method gave satisfactory results.Keywords : Ammonia gas-sensing electrode ; direct Potentiometry ; nico-tinanzide determination ; Ynultivitainin Preparations analysisD. P. NIKOLELIS, C. E. EFSTATHIOU and T. P. HADJIIOANNOULaboratory of Analytical Chemistry, University of Athens, Athens, Greece.Analyst, 1979, 104, 1181-1184.Spectrophotometric Method for the Determination of Residuesof Carbaryl in WaterShovt PaperKeywords ; Carbaryl residues ; water analysis ; spectvophotometryS.K. HANDA and A. K. DIKSHITDivision of Agricultural Chemicals, Indian Agricultural Research Institute, NewDelhi, India.Analyst, 1979, 104, 1185-1188.Selective Spectrophotometric Determination of Zinc with2,2'- Dipyridyl- 2 - cluinolylhydrazoneShort PapevKeywovds : 2,2'-Dipyridyl-2-quinolyllzydvazone reagent ; spectvophotometify ;zinc determination ; alloy analysisR. B. SINGH, P. JAIN, B. S. GARG and R. P. SINGHDepartment of Chemistry, University of Delhi, Delhi-110007, India.Analyst, 1979, 104, 1188-1191.Determination of Oxycarboxin Residues in Medicinal PlantsShort PaperKeywords : Oxycavboxin detevnzinatio tz ; fungicide residue analysis ; spectvo-photometry ; medicinal plantsW.DEBSKA, B. GNUSOWSKI and B. ZYGMUNTDepartment of Phytochemical Analysis, Institute of Medicinal Plants, Libelta 37,61-707 Poznari, Poland.Analyst, 1979, 104, 1191-1194... Decerutber, 1979 THE ANALYST XlllANALYTICAL SCIENCES MONOGRAPH No. 4Electrothermal Atomization forAtomic Absorption Spectrometryby C. W. FullerAt the present time the two most successful alternatives to the flame appear to bethe electrothermal atomizer and the inductively-coupled plasma. In this book anattempt has been made to provide the author‘s views on the historical develop-ment, commercial design features, theory, practical considerations, analyticalparameters of the elements, and areas of application of the first of these twotechniques, electrothermal atomization.The chapter headings are as follows: History; Theoretical Aspects of theAtomization Process; General Experimental Conditions; Analytical Conditionsfor the Determination of the Elements by Atomic Absorption Spectrometry;Applications (Oil and Oil Products; Metals; Rocks, Minerals and Soils; Waters;Plants; Food and Drugs; Biological Fluids; Biological Tissues; Air Particulates;Refractory Oxides and Related Materials; Other Analytical Applications;Theoretical).Clothbound 135pp 82” x 5” 0 851 86 777 4 f6.75 ($1 3.50)CS Members f5.50THE CHEMICAL SOCIETYDistribution Centre, Blackhorse Road, Letchworth,Herts., SG6 1 HN, EnglandAnnual Reports on AnalyticalAtomic SpectroscopyVOLUME 8, 1978This comprehensive and critical report of developments in analytical atomicspectroscopy has been compiled from about 1500 reports received from world-wide correspondents who are internationally recognised authorities in the fieldand who constitute the Editorial Board.In addition to surveying developmentsthroughout the world published in national or international journals, a particu-lar aim has been to include less widely accessible reports from local, nationaland international symposia and conferences concerned with atomic spectros-COPY.(Still available: Vols 3-7 covering 1973 to 1977)Clothbound 273pp 8 2 x 6” f 17.50 (CS Members f 13.00)Obtainable from : The Chemical Society, Distribution Centre,Blackhorse Road, Letchworth, Herts., SG6 1 H xiv SUMMARIES OF PAPERS I N THIS ISSUE December, 1979Determination of Nitrate and Nitrite in River WatersShort PaperKeywords : Nitrate determination ; nitrite determination ; water analysis ;spectrophotometryMIEKO OKADA, HARUO MIYATA and KYOJI TOE1Department of Chemistry, Faculty of Science, Okayama University, Tsusliima-naka3-1-1, Okayama-shi 700, Japan.Analyst, 1979, 104, 1195-1 197.Extraction of Methylmercury from Fish and Its Determinationby Atomic-absorption SpectroscopyShort! PaperKeywords : Methylmercury extraction ; metlzylmercury determination ; fisJzanalysis ; atomic-absorption spcctvoscopy ; cold-vapour methodR.CAPELLI, C. FEZIA, A. FRANCHI and G. ZANICCHIInstitute of General and Inorganic Chemistry, Oceanological Research Group,University of Genoa, Genoa, Italy.Analyst, 1979, 104, 1197-1200.Determination of Antimony(II1) by Titration with Manganese(II1)and Manganese(1V)Sh o ~2 P a p e rKeywords : Titrimetry ; antimony(II I ) determination ; manganese(III) ;manganese(I V ) ; iodine monochlorideMrs. N. RUKMINI, V. S . N. P. KAVITHA and K. RAMA RAODepartment of Chemistry, Andhra University, Waltair-530 003, India.Analyst, 1979, 104, 1201-1204.Determination of Conjugated Diolefins in Cracked NaphthaShort PaperKeywords : Conjugated diolejins ; cracked naphtha ; maleic anhydride - toluenereagent; naaleic anhydride value ; Diels - A ldev reactionS. S. ROY and B. K. GOELIndian Institute of Petroleum, Dehradun-248005, India.Analyst, 1979, 104, 1204-1207