ANALAO 104 (1 237) 273-384 (I 979)ISSN 0003-2654April 197927329029931 3323328334348358367371375378382THE ANALYSTTHE ANALYTICAL JOURNAL OF THE CHEMICAL SOCIETYCONTENTSApproach for Achieving Comparable Analytical Results from a Number o fLaboratories-A. L. WilsonAccuracy o f Determination o f Chloride in River Waters: Analytical QualityControl in the Harmonised Monitoring Scheme-Analytical Quality Control(Harmonised Monitoring) CommitteeStatistical Appraisal o f Interference Effects in the Determination o f TraceElements by Atomic-absorption Spectrophotometry in Applied Geo-chemistry-Michael Thompson, Stephen J. Walton and Shirley J. WoodMinimum Sample Preparation f o r the Determination o f Ten Elements in PigFaeces and Feeds by Atomic-absorption Spectrophotometry and a Spectro-photometric Procedure for Total Phosphorus-Edward P.Hilliard and J.David SmithSulphochlorophenol N as a Spectrophotometric Reagent f o r Vanadium(V)-M. ZenkiOxidative Determination of Dextromoramide (Palfium) in Body Fluids-B.Caddy and R. ldowuReproducibility o f Pyrolysis - Mass Spectrometry Using Three DifferentPyrolysis Systems-D. A. Hickman and I. JaneInterference Films on the Sensor Membranes o f Solid-state Copper(l1) lon-selective Electrodes-G. J. Moody, N. S. Nassory, J. D. R. Thomas, D. Betteridge,P. Szepesvary and B. J. WrightDetermination o f Nitrite Ion in Unused Cutting Fluids and Cutting Oils Using aGas-sensing Electrode Method-Ferrers R. S. C!ark and Hart B. MacPhersonSHORT PAPERSDicarboxidi ne [y,y'- (4,4- Diami no-3,3'-bi phenylylened ioxy)d i butyric Acid] as aReagent f o r the Spectrophotometric Determination of Cyanide andChlorine-Kerstin GroningssonSemi-automatic Determination of Manganese in Natural Waters and PlantDigests by Flow Injection Analysis-M. F. Gin& E. A. G. Zagatto and H.Bergamin FilhoGravimetric Determination o f Copper(l1) and Cobalt(l1) by Selective Precipita-t i o n with Benzimidazole-K. N. UpadhyayaRoutine Determination o f Nitrogen by Kjeldahl Digestion Without Use o fCatalyst-Eric Florence and Douglas Frank MilnerBook ReviewsSummaries of Papers in this lssue-Pages iv. v, viii, i xPrinted by Heffers Printers Ltd Cambridge EnglandEntered as Second Class at Now York. USA, Post Offic