1. Applications of supercritical fluid extraction in food analysis.

   • M. Valcárcel
   • M. T. Tena

   REVIEW Pages: 561 - 573

2. Certification of reference materials for the quality control of major element determinations in groundwater Part 1: Feasibility study

   • M. J. Benoliel
   • P. Quevauviller
   • L. Cortez

   ORIGINAL PAPER Pages: 574 - 580

3. Comparative study on emission characteristics of d.c.- and r.f.-powered Grimm glow discharge plasmas. Use of argon spectral lines

   • K. Wagatsuma
   • Shigeru Suzuki

   ORIGINAL PAPER Pages: 581 - 584

4. Investigation of the functionality of different burner types used for the Wickbold decomposition method

   • D. Erber
   • J. Roth
   • K. Cammann

   Original paper Pages: 585 - 590

5. Speciation of four selenium compounds using high performance liquid chromatography with on-line detection by inductively coupled plasma mass spectrometry or flame atomic absorption spectrometry

   • G. Alsing Pedersen
   • E. H. Larsen

   Original paper Pages: 591 - 598

6. Gaseous sample introduction for the determination of silicon by ICP-AES

   • A. Lopez Molinero
   • Alberto Morales
   • Juan R. Castillo

   Original paper Pages: 599 - 603

7. Potential of a microwave boosted glow discharge source for the analysis of silicon carbide powder

   • Franz Leis

   ORIGINAL PAPER Pages: 604 - 609

8. Quantitative spectrophotometric and EPR-determination of 1,1-diphenyl-2-picryl-hydrazyl (DPPH)

   • N. D. Yordanov
   • Aneta G. Christova

   Original paper Pages: 610 - 613

9. Development of a highly sensitive enzyme-immunoassay for the determination of triazine herbicides

   • M. Winklmair
   • M. G. Weller
   • R. Niessner

   Original paper Pages: 614 - 622

10. Optimisation of supercritical fluid extraction of polynuclear aromatic hydrocarbons from spiked soil and marine sediment standard reference material

    • Marko Notar
    • Hermina Leskovs˘ek

    ORIGINAL PAPER Pages: 623 - 629

11. Improvements of a combined size exclusion chromatography and solid phase extraction approach for the clean-up of marine sediment samples for trace analysis of pesticides

    • K. Bester
    • Heinrich Hühnerfuss

    0RIGINAL PAPER Pages: 630 - 634

12. Determination of As, Cd, and Pb in epicuticular waxes of pine and spruce needles by ETAAS

    • J. Hovorka
    • Geoffrey B. Marshall

    ORIGINAL PAPER Pages: 635 - 640

13. Direct determination of parts-per-billion levels of germanium in botanical samples and coal fly ash by graphite furnace atomic absorption spectrometry

    • Zhang De-qiang
    • Ni Zhe-ming
    • Sun Han-wen

    ORIGINAL PAPER Pages: 641 - 645

14. Determination of lead traces in water and liqueurs by derivative atom trapping flame atomic absorption spectrometry

    • H. Sun
    • Li-li Yang
    • Jian-min Sun

    ORIGINAL PAPER Pages: 646 - 651

15. Holothurians – potential biomonitors for metal levels in deep-sea sediments

    • H. M. Moore
    • David Roberts
    • D. Thorburn Burns

    ORIGINAL PAPER Pages: 652 - 655

16. Flow injection system with gas diffusion for the sequential determination of total nitrogen and phosphorus in vegetables

    • Jose´ L. F. C. Lima
    • Antoacutenio O. S. S. Rangel
    • M. Renata S. Souto

    ORIGINAL PAPER Pages: 657 - 662

17. Micelle-assisted dissolution for the analysis of aspirin by second-order derivative potentiometry

    • P. B. Issopoulos

    ORIGINAL PAPER Pages: 663 - 666

18. Fluorometric determination of formaldehyde

    • S. T. Girousi
    • E. E. Golia
    • A. J. Maroulis

    Short communication Pages: 667 - 668