198 JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY APRIL 199 1 VOL. 6 Future Issues will lnclude- Determination of the High Aluminium Content in Suspended Matter Samples by Slurry Sampling-Electrothermal Atomic Absorption Spectrometry- Michel Hoening Pierre Regnier and Lei Chou Continuous Flow Dilution for Flame Atomic Absorption Spectrometry Using a Variable Volume Dilution Chamber and Peak Area Measurement-Ernest Bein- rohr Pavol Csemi and Julian F. Tyson Determination of Thorium and Uranium in Total Diet Samples by Inductively Coupled Plasma Mass Spectrometry- Kunio Shiraishi Yuichi Takaku Katsumi Yoshimizu Yasuhito Igara- shi Kimihiko Masuda James F. McInroy and Gi-Ichiro Tanaka Suitability of TXRF for Elemental Speci- ation Studies-Sarfraz Mukhtar and Stephen J. Haswell Extraction Discharge Source for Argon Inductively Coupled Plasma Atomic Emission Spectrometry Examination of Analytical Potentials in the Detection of a Range of Elements and Fundamental Properties-Hsiaoming Tan Izumi Ishii and Akbar Montaser Determination of Lead in Biological Samples Using a Flow Injection Flame Atomic Absorption Spectrometric System With On-line Pre-concentration by Co-precipi tat ion Without Filtration- Zhaolun Fang Michael Sperling and Bernhard Welz Determination of Selenium in Acid Di- gested Marine Samples by Electrother- mal Atomic Absorption Spectrometry With Continuum Source Background Correction and Nickel as Chemical Modifier-Amund Maage and Kaare Julshamn Vapour-phase Acid Digestion of Inor- ganic and Organic Matrices for Trace Element Analysis Using a Microwave Heated Bomb-Henryk Matusiewicz R.E. Sturgeon and Shier S. Berman Determination of Nitrogen and Oxygen and Nitrogen-containing Species by Molecular Non-thermal Excitation Spectrometry (MONES) Using Micro- wave-induced Plasma (MIP) and Furnace Non-thermal Excitation Spectrometry (FANES) Sources-Klaus Dittrich Holger Fuchs Jean-Michel Mermet and Brigitte Riviere Flow Injection On-line Separation and Pre-concentration for Electrothermal Atomic Absorption Spectrometry. Part 1 . Determination of Ultratraces of Cadmium. Comer. Lead and Nickel in Water Samples-Michael Sperling Xuefeng Yin and Bernhard Welz Determination of Copper Cobalt Sele- nium and Molybdenum in Liver by Flame and Furnace Atomic Absorption Spectrometry-David H. Parsley Analytical Evaluation of the Water- colled Low Gas Flow Torch for Induc- tively Coupled Plasma Atomic Emission Spectrometry-M. T .C. de Loos- Vollebregt C. N. Vanhoutte and J. J. Tiggelman Rotating Disc nebulizer for ICP-OES- C. J. Rademeyer C. S. Collins and L. R. P. Butler Trace Detection in Conducting Solids Using Laser-induced Fluorescence in a Cathodic Sputtering Cell-John C. Travis G. C. Turk Robert L. Watters Jr. Lijian Yu and James L. Blue Atomic Spectrometry Update The Update i n the June issue is- Advances in Atomic Emission Spectro- metry-David Littlejohn Raymond Jowitt Simon T. Sparkes Anne P. Thorne and Stephen J. Walton