1. Chemometric investigations on the representativity of soil sampling

   • Jürgen Einax
   • Bernd Machelett
   • Klaus Danzer

   Original Papers Pages: 267 - 272

2. Use of a data treatment software for the resolution of overlapping differential pulse polarographic peaks

   • J. J. Berzas Nevado
   • J. Rodríguez Flores

   Original Papers Pages: 273 - 275

3. Potentiometric and conductometric determination of ammonium by gas-diffusion flow injection analysis

   • Wolfgang Frenzel
   • Cheng-Yu Liu

   Original Papers Pages: 276 - 280

4. Preparation and properties of an 8-hydroxyquinoline silica gel, synthesized via mannich reaction

   • U. Pyell
   • G. Stork

   Original Papers Pages: 281 - 286

5. Karl Fischer titration in boiling methanol

   • H. -D. Isengard
   • U. Striffler

   Original Papers Pages: 287 - 291

6. Fiber optic near-infrared spectroscopy in the refining industry

   • Susan J. Foulk
   • Bruce E. DeSimas II

   Original Papers Pages: 292 - 294

7. Evaluation of the interelemental effect in X-ray fluorescence analysis by the total addition method

   • F. Bosch Reig
   • V. Peris Martinez
   • J. V. Gimeno Adelantado

   Original Papers Pages: 295 - 298

8. Certification of VL-2, a Venezuelan lateritic material as a standard reference material

   • J. J. LaBrecque
   • H. Schorin

   Original Papers Pages: 299 - 305

9. Certification of SLB-1, a Suriname lateritic bauxite material as a standard reference material

   • J. J. LaBrecque
   • H. Schorin

   Original Papers Pages: 306 - 311

10. Examination of steel samples, provided as reference materials, by instrumental analyses

    • P. Hoffmann
    • R. Jährling
    • K. H. Lieser

    Original Papers Pages: 312 - 317

11. Simultaneous spectrophotometric determination of metal ions with 4-(pyridyl-2-azo)resorcinol (PAR)

    • E. Gómez
    • J. M. Estela
    • M. Blanco

    Original Papers Pages: 318 - 321

12. A new kinetic photometric method for the simultaneous determination of metals based on catalytic and activating effects

    • A. Cladera
    • A. Caro
    • V. Cerdà

    Original Papers Pages: 322 - 326

13. Indirect kinetic determination of As(III) based on its accelerating effect on the Os(VIII)-catalysed reaction between iodide and bromate in a micellar medium

    • Dolores Sicilia
    • Soledad Rubio
    • Dolores Pérez-Bendito

    Original Papers Pages: 327 - 332

14. Separation and determination of S-anions in very small samples by microbore ion chromatography

    • M. Weidenauer
    • P. Hoffmann
    • K. H. Lieser

    Original Papers Pages: 333 - 336

15. Determination of thorium in the range of low concentrations

    • R. Hill
    • K. H. Lieser

    Original Papers Pages: 337 - 340

16. Investigations of oxidative UV photolysis

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

    Original Papers Pages: 341 - 349

17. Adsorptive stripping voltammetric determination of cobalt at ppb levels in high-purity aluminium

    • Pamidi V. A. Prasad
    • J. Arunachalam
    • S. Gangadharan

    Original Papers Pages: 350 - 351

18. Investigation for the determination of ultra trace amounts of Co²⁺ complexed with 1,10-phenanthroline by adsorptive voltammetry

    • Vassiliki I. Bebeki
    • Anastasios N. Voulgaropoulos

    Original Papers Pages: 352 - 356

19. Separation of arsenic anions by capillary zone electrophoresis with UV detection

    • P. Morin
    • M. B. Amran
    • M. Leroy

    Original Papers Pages: 357 - 362

20. Phase analysis of high-temperature superconductors by selective dissolution combined with ICP-AES

    • Zhu Jianzhong
    • I. G. Vasileva
    • Z. I. Boris

    Original Papers Pages: 363 - 366

21. Characterisation of high-critical temperature superconducting materials by ICP-AES technique

    • Madhuri J. Kulkarni
    • Aparna A. Argekar
    • M. D. Sastry

    Original Papers Pages: 367 - 369

22. Determination of arsenic in glass and raw materials for glass via quartz-tube hydride generation AAS after separation by solvent extraction

    • Udo Rohr
    • Lothar Meckel

    Original Papers Pages: 370 - 375

23. Characterization of a chelating silica gel with immobilized 2-amino-1-cyclopentene-1-dithiocarboxylic acid (ACDA)

    • U. Pyell
    • G. Stork

    Original Papers Pages: 376 - 380

24. Possibilities for the identification of organic coating on inorganic matter

    • R. Doiber
    • N. Wamser

    Original Papers Pages: 381 - 386

25. Diethyldithiocarbamate (DDTC) extraction of copper(II) and iron(III) associated with humic substances in water

    • Masataka Hiraide
    • Hiroshi Hommi
    • Hiroshi Kawaguchi

    Original Papers Pages: 387 - 390

26. Simultaneous determination of arsenic, selenium and antimony in water by an inductively coupled plasma hydride method

    • L. Pretorius
    • P. L. Kempster
    • J. F. van Staden

    Original Papers Pages: 391 - 393

27. A fiber optic evanescent field absorption sensor for monitoring organic contaminants in water

    • J. Bürck
    • J. -P. Conzen
    • H. -J. Ache

    Original Papers Pages: 394 - 400

28. Continuous flow thin-layer headspace (TLHS) analysis

    • E. Kozłowski
    • T. Górecki
    • E. Sieńkowska-Zyskowska

    Original Papers Pages: 401 - 404

29. Storage stability of polycyclic aromatic hydrocarbons collected from ambient air using solid supports

    • Gerd Kloster
    • Reinhard Niehaus
    • Helene Stania

    Original Papers Pages: 405 - 408

30. Aspects of cleaning environmental materials for multi-element analysis, e.g. plant samples

    • Bernd Markert

    Original Papers Pages: 409 - 412

31. A simple method for the determination of amitrole in drinking and ground water

    • A. Pachinger
    • E. Eisner
    • H. Klus

    Original Papers Pages: 413 - 415

32. Research in environmental pollution

    • H. Steinwandter

    Original Papers Pages: 416 - 420

33. Retention-index based vapor pressure estimation for polychlorobiphenyl (PCB) by gas chromatography

    • Regina C. Fischer
    • R. Wittlinger
    • K. Ballschmiter

    Original Papers Pages: 421 - 425

34. On-line sample preparation and determination of phenols with a Flow-Analysis method

    • C. Kwade
    • R. Voigtländer
    • K. Cammann

    Original Papers Pages: 426 - 428

35. Preconcentration and determination of bentazepam at C18-modified carbon paste electrodes

    • P. Hernández
    • E. Lorenzo
    • L. Hernández

    Original Papers Pages: 429 - 432

36. Determination of environmental caused chlorophenol levels in urine of the general population

    • J. Angerer
    • B. Heinzow
    • G. Lehnert

    Original Papers Pages: 433 - 438

37. Spectrophotometric determination of iron(II) in anti-anaemic preparations using a newly developed Schiff's base

    • Prodromos B. Issopoulos
    • Pantelis T. Economou

    Original Papers Pages: 439 - 443

38. Multielement analysis of biological reference materials by total-reflection X-ray fluorescence and inductively coupled plasma mass spectrometry in the semiquant mode

    • Klaus Günther
    • Alex von Bohlen
    • Reinhold Klockenkämper

    Original Papers Pages: 444 - 448

39. On the determination of phosphorus in some processed fruit products by wet-digestion and dry-ashing methods — a preliminary report

    • C. F. Oduoza
    • S. A. Thomas

    Original Papers Pages: 449 - 451

40. Microwave muffle furnace assisted decomposition of vegetable samples for flame atomic spectrometric determination of Ca, Mg, K, Fe, Mn and Zn

    • A. Morales-Rubio
    • A. Salvador
    • M. de la Guardia

    Original Papers Pages: 452 - 456

41. A coupled NMR and MS isotopic method for the authentication of natural vinegars

    • Gérald Remaud
    • Claude Guillou
    • Gérard J. Martin

    Original Papers Pages: 457 - 461

42. Simultaneous determination of ascorbic acid and dehydroascorbic acid by HPLC with postcolumn derivatisation and fluorometric detection

    • Michaela Capellmann
    • Hermann M. Bolt

    Original Papers Pages: 462 - 466

43. Research in environmental pollution

    • H. Steinwandter

    Short Communication Pages: 467 - 467