1. Reference materials: A gap in the quality system?

   • Ph. Quevauviller

   Editorial Pages: 737 - 738

2. Carbohydrate analysis by high-performance anion-exchange chromatography with pulsed amperometric detection: The potential is still growing

   • T. R. I. Cataldi
   • C. Campa
   • G. E. De Benedetto

   Review Pages: 739 - 758

3. A calix[4]arene based calcium-selective optode membrane: Measuring the absorbance maximum wavelength shift

   • J. M. Kürner
   • T. Werner

   Original paper Pages: 759 - 762

4. Study of the binding characteristics and transportation properties of a 4-aminopyridine imprinted polymer membrane

   • Hongsheng Guo
   • Xiwen He
   • Hong Liang

   Original paper Pages: 763 - 767

5. A polystyrene based membrane electrode for cadmium(II) ions

   • A. Panwar
   • S. Baniwal
   • A. K. Singh

   Original paper Pages: 768 - 772

6. Comparison of several spray chambers operating at very low liquid flow rates in inductively coupled plasma atomic emission spectrometry

   • J.-L. Todolí
   • S. Maestre
   • V. Hernandis

   Original paper Pages: 773 - 779

7. Application of a modified simplex method to the multivariable optimization of a new FIA system for the determination of osmium

   • Hongping Xu
   • Huitao Liu
   • Zhide Hu

   Original paper Pages: 780 - 785

8. Determination of the changes of the basic structures of silica species in dependence on the concentration of sodium chloride by FAB-MS

   • M. Tanaka
   • K. Takahashi

   Original paper Pages: 786 - 790

9. Polydiphenylamine-dodecyl sulfate films for the simultaneous amperometric determination of electroinactive anions and cations in ion-exclusion cation-exchange chromatography

   • Qun Xu
   • Chun Xu
   • Akihide Itoh

   Original paper Pages: 791 - 796

10. Determination of low-level mercury based on a renewable-drops sensing technique

    • RongHua Yang
    • KeMin Wang
    • XiaoHai Yang

    Original paper Pages: 797 - 802

11. Arsenic speciation based on ion exchange high-performance liquid chromatography hyphenated with hydride generation atomic fluorescence and on-line UV photo oxidation

    • He Bin
    • Jiang Gui-bin
    • Xu Xiao-bai

    Original paper Pages: 803 - 808

12. Three-phase double-arc plasma for spectrochemical analysis of environmental samples

    • M. M. Mohamed
    • Z. F. Ghatass
    • M. El-Raey

    Original paper Pages: 809 - 815

13. A liquid chromatography-tandem mass spectrometry method for fluazifop residue analysis in crops

    • E. Bolygo
    • A. Boseley

    Original paper Pages: 816 - 819

14. Surface characterization of polydimethylsiloxane treated pharmaceutical glass containers by X-ray-excited photo- and Auger electron spectroscopy

    • T. Mundry
    • P. Surmann
    • T. Schurreit

    Original paper Pages: 820 - 831

15. Voltammetric determination of mifepristone at a DNA-modified carbon paste electrode

    • K. Gu
    • J. Zhu
    • H.-Y. Chen

    Original paper Pages: 832 - 835

16. Determination of vitamin B₁₂ in pharmaceutical preparations by a highly sensitive fluorimetric method

    • Hua-Bin Li
    • Feng Chen

    Original paper Pages: 836 - 838

17. Quantification of the metal distribution in metallothioneins of the human liver by HPLC coupled with ICP-AES

    • Ch. Wolf
    • U. Rösick
    • P. Brätter

    Original paper Pages: 839 - 843

18. Determination of idarubicin in human urine by capillary zone electrophoresis with amperometric detection

    • Q. Hu
    • T. Zhou
    • Y. Fang

    Original paper Pages: 844 - 847

19. Resonance Rayleigh scattering method for the determination of trace amounts of cadmium with iodide-basic triphenylmethane dye systems

    • Sh. Liu
    • Zh. Liu
    • H. Luo

    Short communication Pages: 848 - 852

20. Rapid identification of carbendazim and linuron by adsorptive stripping on a carbon fiber ultramicroelectrode

    • M. J. González de la Huebra
    • P. Hernández
    • L. Hernández

    Short communication Pages: 853 - 856