1. Long-term stability of sulfur dioxide permeation tube standard reference materials

   • G. D. Mitchell
   • W. D. Dorko
   • P. A. Johnson

   Original Papers Pages: 229 - 233

2. Speciation of Cr(VI)/Cr(III) by electrothermal atomisation AAS after electrodeposition on a L'vov platform

   • Juan C. Vidal
   • José M. Sanz
   • Juan R. Castillo

   Original Papers Pages: 234 - 241

3. Systematic investigation of aluminium interferences with the alkaline earths in flame atomic absorption spectrometry

   • Werner Luecke

   Original Papers Pages: 242 - 246

4. Effect of tetraalkylammonium salt on the retention of metal chelates in reversed phase-high performance liquid chromatography

   • Jun'ichiro Miura

   Original Papers Pages: 247 - 251

5. Separation and preconcentration of traces of gallium, titanium and zirconium by means of a new chelating resin containing pyrocatechol violet as functional group

   • Xing-Yin Luo
   • Zhi-Xing Su
   • Xi-Jun Chang

   Original Papers Pages: 252 - 255

6. Determination of nitrite as pentafluorobenzyl derivative by RP-HPLC and UV detection with and without ion-pair extraction

   • Dimitrios Tsikas
   • Jürgen C. Frölich

   Original Papers Pages: 256 - 260

7. Trace characterisation of lithium niobate by neutron activation analysis

   • R. Verma
   • J. Arunachalam
   • M. K. Gupta

   Original Papers Pages: 261 - 264

8. Determination of Cu³⁺, Bi⁵⁺ and Pb⁴⁺ in high T_c superconducting oxides by Cl₂ generation, or by O₂ together with Cl₂ generation

   • Michiko Namiki
   • Kichinosuke Hirokawa

   Original Papers Pages: 265 - 268

9. Comparison of dissolution procedures for the determination of cadmium and lead in plastics

   • A. Vollrath
   • T. Otz
   • H. G. Seiler

   Original Papers Pages: 269 - 274

10. Differential pulse polarography and voltammetry of di-2-pyridyl ketone benzoylhydrazone

    • M. M. Kamal
    • A. Z. Abu Zuhri
    • M. M. Hannoun

    Original Papers Pages: 275 - 278

11. HPLC preparation of nitrate from ice cores for mass spectrometric ¹⁵N/¹⁴N measurements

    • P. Bordat
    • H. D. Freyer
    • T. Vissac

    Original Papers Pages: 279 - 282

12. Investigations of oxidative UV photolysis

    • M. Kolb
    • P. Rach
    • A. Wild

    Original Papers Pages: 283 - 285

13. Occurrence of the sulphur analogue of octachlorodibenzo-p-dioxin in the environment and investigations on its potential source

    • Thomas Benz
    • Hanspaul Hagenmaier
    • Jianwen She

    Original Papers Pages: 286 - 291

14. Highly sensitive spectrophotometric determination of osmium(VIII) with pyrogallolphthalein and hydrogen peroxide in the presence of Brij 35

    • Itsuo Mori
    • Yoshikazu Fujita
    • Yoko Takeuchi

    Short Communications Pages: 292 - 294

15. Micellar chromatographic separation of vanadium(V) chelate with 2-(2-thiazolylazo)-5-dimethylaminophenol

    • Jun'ichiro Miura

    Short Communications Pages: 294 - 295